DeviceNet Media
Design and Installation Guide
Important User Information
Solid state equipment has operational characteristics differing from those of
electromechanical equipment. Safety Guidelines for the Application, Installation and
Maintenance of Solid State Controls (Publication SGI-1.1 available from your local
Rockwell Automation sales office or online at http://www.ab.com/manuals/gi)
describes some important differences between solid state equipment and hard-wired
electromechanical devices. Because of this difference, and also because of the wide
variety of uses for solid state equipment, all persons responsible for applying this
equipment must satisfy themselves that each intended application of this equipment is
acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or
consequential damages resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes.
Because of the many variables and requirements associated with any particular
installation, Rockwell Automation, Inc. cannot assume responsibility or liability for
actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of
information, circuits, equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written
permission of Rockwell Automation, Inc. is prohibited.
Throughout this manual we use notes to make you aware of safety considerations.
WARNING
IMPORTANT
ATTENTION
SHOCK HAZARD
BURN HAZARD
Identifies information about practices or circumstances that can
cause an explosion in a hazardous environment, which may lead
to personal injury or death, property damage, or economic loss.
Identifies information that is critical for successful application
and understanding of the product.
Identifies information about practices or circumstances that can
lead to personal injury or death, property damage, or economic
loss. Attentions help you:
• identify a hazard
• avoid a hazard
• recognize the consequence
Labels may be located on or inside the equipment to alert people
that dangerous voltage may be present.
Labels may be located on or inside the euipment to alert people
that surfaces may be dangerous temperatures.
Preface
What’s in This Manual
Who Should Read This
Manual
Use this manual to design and install a DeviceNet™ cable system. This manual
describes the required components of the cable system and how to design for
and install these required components. This manual also contains a chapter on
general network troubleshooting tips.
TIP
TIP
We assume that you have a fundamental understanding of:
• electronics and electrical codes
• basic wiring techniques
• ac and dc power specifications
• load characteristics of the devices attached to the DeviceNet network
Throughout this manual, we use the terms “unsealed” and
“open” interchangeably.
The catalog numbers listed in this document are
representative of the full range of available DeviceNet
media products. For a complete list of DeviceNet media,
refer to the On-machine Connectivity Catalog,
publication M115-CA001.
1 Publication DNET-UM072C-EN-P - July 2004
2
For Your Reference
Rockwell Automation provides many useful tools for planning and
configuring your DeviceNet network.
for information on refer to go to
selecting a DeviceNet network, as well as
the individual devices you can use on the
network
available DeviceNet-enabled and
conformance-tested products from
Rockwell Automation and other vendors
developer information, standards,
electronic data sheet (EDS) files, etc.
guidelines and safety tips for wiring and
grounding your network
NetLinx Selection Guide, publication
NETS-SG001
DeviceNet Media, Sensors, and Distributed
I/O Catalog, publication 1485-CG001
On-machine Connectivity Catalog, publication
M115-CA001
Integrated Architecture Builder
The Open DeviceNet Vendor Association
product catalog
Rockwell Automation’s networks home page www.ab.com/networks
Industrial Automation Wiring and Grounding
Guidelines, publication 1770-4.1
www.rockwellautomation.com/literature
www.rockwellautomation.com/literature
www.rockwellautomation.com/literature
www.ab.com/logix/iab/download.html
www.odva.org
www.rockwellautomation.com/literature
Publication DNET-UM072C-EN-P - July 2004
3
Using Integrated Architecture Builder (IAB)
Integrated Architecture Builder is a graphical tool designed to help you
configure and quote Logix-based control systems, including validation of
DeviceNet cable power requirements. With IAB, you can build a control
system using a wizard and other common Microsoft Windows tools such as
tree views, drag-and-drop, and cut-copy-paste. IAB also allows you to open
product manuals to help you configure a system. Once you configure the
system, the software performs validity checking, and you can generate a report
to be used in quoting the control system.
Figure Preface.1 shows a sample of the IAB interface you use to build a
system.
Figure Preface.1 Integrated Architecture Builder
You can select control
platforms and components
to build a system. IAB
automatically verifies
system validity.
Publication DNET-UM072C-EN-P - July 2004
4
About the National Electric
Code
About the DeviceNet
Network Hazardous
Environment Rating
Much of the information provided in this manual is representative of the
capability of a DeviceNet network and its associated components. The
National Electric Code (NEC), in the United States, and the Canadian Electric
Code (CECode), in Canada, places limitations on configurations and the
maximum allowable power/current that can be provided.
for details.
IMPORTANT
ATTENTION
During the planning and installation of your DeviceNet
network, research and adhere to all national and local
codes.
The DeviceNet network is not rated for use in hazardous
environments, such as Class1, Div 2 installations.
Refer to Appendix A
Publication DNET-UM072C-EN-P - July 2004
Get Started
Table of Contents
Chapter 1
What’s in This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Before You Begin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Set Up a DeviceNet Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Basic DeviceNet network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Understand the topology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Understand the Media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Understand the cable options . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Determine the maximum trunk line distance . . . . . . . . . . . . . . . . 1-7
Determine the cumulative drop line length . . . . . . . . . . . . . . . . . 1-9
About direct connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
About connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Terminate the Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Guidelines for supplying power . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Supply Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Choose a power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
About power ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
Size a power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
Place the power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
Connect power supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
Ground the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
Use the Checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
Identify Cable System Components
Chapter 2
About Thick Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
About Thin Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
About Flat Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Connect to the Trunk Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
About the T-Port tap. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
About the DeviceBox tap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
About the PowerTap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
About the DevicePort tap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
About direct connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
About open-style connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
About open-style taps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
About KwikLink Insulation Displacement Connectors (IDCs) 2-15
Use Preterminated Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
About thick cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
About thin cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
About KwikLink drop cables . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
About terminators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
i Publication DNET-UM072C-EN-P - July 2004
Table of Contents ii
Make Cable Connections
Chapter 3
Prepare Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Install Open-Style Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Install Mini/Micro Sealed Field-Installable Connectors . . . . . . . . . . 3-3
Install DeviceBox and PowerTap Taps. . . . . . . . . . . . . . . . . . . . . . . . 3-4
Install PowerTap Taps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Install DeviceBox Taps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Install DevicePort Taps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Connect Drop Lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Install KwikLink Cable and KwikLink Heavy-Duty Connectors . . 3-10
Install a KwikLink open-style connector to a drop cable . . . . . 3-13
Install end caps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
Install Class 1 KwikLink power cable. . . . . . . . . . . . . . . . . . . . . 3-15
Connect a Power Supply to Round Media . . . . . . . . . . . . . . . . . . . . 3-16
Connect Power Supplies to KwikLink Flat Media . . . . . . . . . . . . . . 3-17
Class 1, 8A System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Class 2, 4A System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Determine Power Requirements
Correct and Prevent Network
Problems
Chapter 4
Class 1 (CL1) cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Class 2 (CL2) Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Use the Look-up Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
One power supply (end-connected) . . . . . . . . . . . . . . . . . . . . . . 4-11
One power supply (middle-connected). . . . . . . . . . . . . . . . . . . . 4-12
NEC/CECode current boost configuration . . . . . . . . . . . . . . . 4-15
Two power supplies (end-connected) in parallel with no
V+ break . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Two Power supplies (not end-connected) in parallel with no V+
break . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Use the Full-calculation Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
Use the Equation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
One power supply (end-connected) . . . . . . . . . . . . . . . . . . . . . . 4-22
One power supply (middle-connected). . . . . . . . . . . . . . . . . . . . 4-23
Chapter 5
General Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Diagnose Common Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Check System Design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Use Terminating Resistors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Ground the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Diagnose Power Supply Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
When choosing a power supply, keep the following tips
in mind:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
Verify Network Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8
If voltages are too low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
Publication DNET-UM072C-EN-P - July 2004
Understand Select NEC Topics
Power Output Devices
Index
Table of Contents iii
Appendix A
Specify Article 725 Topics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Round (thick & thin) and Class 2 flat media . . . . . . . . . . . . . . . A-1
Class 1 flat media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Appendix B
Use DeviceNet Power Supplies to Operate Output Devices . . . . . . B-1
Noise or Transient Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Publication DNET-UM072C-EN-P - July 2004
Table of Contents iv
Publication DNET-UM072C-EN-P - July 2004
Get Started
Chapter
1
What’s in This Chapter
This chapter introduces the DeviceNet cable system and provides a brief
overview of how to set up a DeviceNet network efficiently. The steps in this
chapter describe the basic tasks involved in setting up a network.
for information on this topic see page
Before You Begin 1-2
Set Up a DeviceNet Network 1-4
Understand the Media 1-5
Terminate the Network 1-13
Supply Power 1-15
Ground the Network 1-22
Use the Checklist 1-24
TIP
The catalog numbers listed in this document are
representative of the full range of available DeviceNet
media products. For a complete list of DeviceNet media,
refer to the On-machine Connectivity Catalog,
publication M115-CA001.
1 Publication DNET-UM072C-EN-P - July 2004
1-2 Get Started
Before You Begin
Before you begin laying out your DeviceNet network, take a few minutes to
consider the following decisions you must make.
1. What control platform should I use?
For help with choosing the correct control platform for the
application, refer to Chapter 2 of the NetLinx Selection Guide,
publication NETS-SG001.
After selecting the control platform, use Chapter 2 of the NetLinx
Selection Guide, publication NETS-SG001, to help you choose the
DeviceNet communication interface for that platform.
TIP
2. What I/O devices will I need?
For help with choosing the correct I/O devices for the application,
refer to Chapter 2 of the NetLinx Selection Guide, publication
NETS-SG001.
Once you have selected all DeviceNet devices for your
network, calculate the total data size required by the
DeviceNet-networked devices. Compare the total data
size required against the total amount available from
the DeviceNet scanner module you have selected.
If you plan to hard-wire certain devices to I/O modules, calculate
the total number of discrete I/O points, such as sensors, photoeyes,
etc., in your application.
TIP
Calculate the total required analog I/O channels.
Calculate the total I/O points being brought into I/O modules
versus direct connections to the network.
Decide which type of discrete I/O you will use in your application:
sealed (such as FLEXArmor or MaXum), or open-style (typically
contained in enclosures).
All DeviceNet-capable devices require a unique
network node number, which counts against the total
node count of 63. If the I/O points are standard
discrete versions, they will be connected to t he
DeviceNet network via a discrete I/O-to-DeviceNet
adapter. In this case, only the I/O adapter would
require a network node number, allowing you to
connect multiple I/O points with one adapter.
Publication DNET-UM072C-EN-P - July 2004
Get Started 1-3
Decide whether to use DeviceLogix/EE-capable I/O to run
internal, programmable logic within the actual devices for fast
execution rates.
Document the data table requirements for each node. This
information will help you develop the control platform user
program.
3. What type of network media is best for my application?
For help in determining which media best fits your application,
refer to the following publications:
for refer to
media characteristics and specifications DeviceNet Media, Sensors, and Distributed
I/O Catalog, publication 1485-CG001
On-machine Connectivity Catalog,
publication M115-CA001
guidelines for wiring and grounding your
network
Industrial Automation Wiring and
Grounding Guidelines, publication 1770-4.1
Determine whether you need a Class 1 or Class 2 cabling system.
Choose sealed or unsealed media for your application’s
environment.
Choose the maximum trunk length allowable within specifications
for the cable type and communication baud rate.
Ensure that your cumulative cable drop length is within
specifications for the network baud rate.
Ensure that all individual drop line lengths are </= 20 ft. (6m).
Ensure that you have one 121Ω terminating resistor at each end of
the trunk line.
4. Which power supply will be adequate for my application?
Refer to this publication for further details on selecting a power
supply.
5. How do I configure my network?
You can use RSNetWorx for DeviceNet software to generate an
offline configuration file which contains all the I/O mapping for
your system. This file will help you develop a control platform user
Publication DNET-UM072C-EN-P - July 2004
1-4 Get Started
program. Refer to the online help accompanying RSNetWorx for
DeviceNet software for assistance in adding and configuring devices.
Once you have added devices, use either RSNetWorx for
DeviceNet software or the device’s hardware mechanism to
commission a node for that device.
Use RSNetWorx for DeviceNet software to create and download a
scanlist to the master scanner.
6. How do I check system performance?
To obtain Rockwell Automation’s off-line performance simulation
tools, visit www.ab.com and click on Support ⇒Knowledgebase
⇒DeviceNet Performance.
Set Up a DeviceNet
Network
1
Understand the
Media
refer to page 1-5
2
Terminate the
Network
refer to page 1-13
3
Supply Power
refer to page 1-15
4
Ground the Network
refer to page 1-22
5
Use the Checklist
refer to page 1-24
The following diagram illustrates the steps that you should follow to plan and
install a DeviceNet network. The remainder of this chapter provides an overview
and examples of each step.
1 Understand the Media Refer to page 1-5
2 Terminate the Network Refer to page 1-13
3 Supply Power Refer to page 1-15
4 Ground the Network Refer to page 1-22
5 Use the Checklist Refer to page 1-24
Publication DNET-UM072C-EN-P - July 2004
Basic DeviceNet network
This figure shows a basic DeviceNet network and calls out its basic components.
Get Started 1-5
1
Understand the
Media
3,4
TR
2
trunk line
drop lines
Power
Supply
TR
5
1
D
terminating resistor
Understand the topology
The DeviceNet cable system uses a trunk/drop line topology.
TR
TR
2
device or node
Checklist
41829
TR
You must terminate the trunk line at both ends
with 121Ω, 1%, 1/4W or larger terminating
resistors.
trunk line
drop line
device or node
TR = terminating resistor
41826
Publication DNET-UM072C-EN-P - July 2004
1-6 Get Started
All Allen-Bradley media, including KwikLink,
meets or exceeds the specifications defined in
the ODVA DeviceNet Specification.
Understand the cable options
You can connect components using three cable options.
Use this cable As
Round (thick) the trunk line on the DeviceNet network
with an outside diameter of 12.2 mm
(0.48 in.). You can also use this cable for
drop lines.
Round (thin) the drop line connecting devices to the main
line with an outside diameter of 6.9 mm
(0.27 in.). This cable has a smaller diameter
and is more flexible than thick cable. You
can also use this cable for the trunk line.
Flat
Class 1 power supplies allow for an 8A
system and the use of Class 1 flat cable.
Class 2 flat cable must not exceed 4A.
KwikLink drop cable a non-shielded, 4-conductor drop cable for
Unshielded drop cable a non-shielded, 4-conductor drop cable
the trunk line on the DeviceNet network,
with dimensions of 19.3 mm x 5.3 mm (0.76
in. x 0.21 in.). This cable has no
predetermined cord lengths, and you are
free to put connections wherever you need
them.
use only in KwikLink systems.
(with an outside diameter specified by the
vendor) for use only in flat cable systems
Publication DNET-UM072C-EN-P - July 2004
Determine the maximum trunk line distance
Get Started 1-7
The maximum cable distance is not
necessarily the trunk length only. It is the
maximum distance between any two devices.
Wire
Color
white CAN_H signal signal
blue CAN_L signal signal
bare drain shield n/a
black V- power power
red V+ power power
Wire
Identity
Usage
Round
Usage
Flat
TIP
Round cable (both thick and thin) contains five wires: One
twisted pair (red and black) for 24V dc power, one twisted
pair (blue and white) for signal, and a drain wire (bare).
Flat cable contains four wires: One pair (red and black) for
24V dc power; one pair (blue and white) for signal.
Drop cable for KwikLink is a 4-wire unshielded gray cable.
It is used only with KwikLink flat cable systems.
The distance between any two points must not exceed the maximum cable
distance allowed for the data rate used.
Data rate Maximum
distance
(flat cable)
125k bit/s 420m (1378 ft) 500m (1640 ft) 100m (328 ft)
250k bit/s 200m (656 ft) 250m (820 ft) 100m (328 ft)
500k bit/s 75m (246 ft) 100m (328 ft) 100m (328 ft)
Maximum
distance
(thick cable)
Maximum
distance
(thin cable)
Publication DNET-UM072C-EN-P - July 2004
1-8 Get Started
p
In most cases, the maximum distance should be the measurement between
terminating resistors. However, if the distance from a trunk line tap to the
farthest device connected to the trunk line is greater than the distance from the
tap to the nearest terminating resistor (TR), then you must include the drop line
length as part of the cable length.
Measure the distance between the terminating resistors.
TR
D
D
Always use the longest distance
between any 2 nodes of the network.
3m (9.843 ft)
TR
D
tap
drop
5m (16.405 ft)
D
taptaptap
drop
D
Measure both drops and across the trunk.
tap
D
tap
D
D
1m (3.281 ft)
tap
D
tap
D
drop
5m (16.405 ft)
3m (9.843 ft)
If the distance from the TR to the last
tap is greater than the distance of
the drop, then measure from the TR.
3m (9.843 ft)
tap
If the distance from
the TR to the last ta
is less than the
distance of the drop,
D
measure from the
device.
TR
D
TR
D
Publication DNET-UM072C-EN-P - July 2004
TIP
41647
To extend the length of your network and
allow longer drop line lengths, you can
purchase a bus extender or wireless DeviceNet
modem from various vendors, such as Western
Reserve Controls, one of Rockwell
Automation’s Encompass partners. Contact
your Rockwell Automation representative for
details.
Determine the cumulative drop line length
Get Started 1-9
The data rate you choose determines the trunk
line length and the cumulative length of the drop
line.
The maximum cable distance from any device
on a branching drop line to the trunk line is 6m
(20 ft).
TR TR
4m (13 ft)
The cumulative drop line length refers to the sum of all drop lines, thick or thin
cable, in the cable system. This sum cannot exceed the maximum cumulative
length allowed for the data rate used.
Data rate Cumulative drop line length
125k bit/s 156m (512 ft)
250k bit/s 78m (256 ft)
500k bit/s 39m (128 ft)
The following example uses four T-Port (single-port) taps and two DevicePort™
(multi-port) taps to attach 13 devices to the trunk line. The cumulative drop line
length is 42m (139 ft) and no single node is more than 6m (20 ft) from the trunk
line. This allows you to use a data rate of 250k
bit/s or 125k bit/s. A data rate of 500k bit/s cannot be used in this example
because the cumulative drop line length (42m) exceeds the total allowed (39m)
for that data rate.
2m (6.6)
2m(6.6 ft)
DevicePort tap
(4 ports)
= trunk line
= drop line
= device or node
TR = terminating resistor
1m
(3.3 ft)
4m (13 ft)
3m (10 ft)
3m (10 ft)
2m (6.6 ft)
3m (10 ft)
3m (10 ft)
2m (6.6 ft)
1m
(3.3 ft)
3m (10 ft)
DevicePort tap
(8 ports)
5m
(16 ft)
4m
(13 ft)
41853
Publication DNET-UM072C-EN-P - July 2004
1-10 Get Started
Wire
Color
white CAN_H signal signal
blue CAN_L signal signal
bare drain shield n/a
black V- power power
red V+ power power
Wire
Identity
Usage
Round
Usage
Flat
About direct connection
Connect devices directly to the trunk line only if you can later remove the devices
without disturbing communications on the cable system.This is called a
“zero-length” drop, because it adds nothing (zero) when calculating cumulative
drop line length.
IMPORTANT
If a device provides only fixed-terminal blocks for its
connection, you must connect it to the cable system by a
drop line. Doing this allows you to remove the device at the
tap without disturbing communications on the trunk line of
the cable system.
About connectors
Connectors attach cables to devices or other components of the DeviceNet
cable system. Field-installable connections are made with either sealed or open
connectors.
device with
removable
open-style
connector
device with
fixed, open-style
connector
41674
Connector Description
Sealed
Open Plug-in: Cable wires attach to a removable connector.
Mini-style: Attaches to taps and thick and thin cable.
Micro-style: Attaches to thin cable only - has a reduced
current rating.
Fixed: Cable wires attach directly to non-removable screw
terminals (or equivalent) on device.
41839
Publication DNET-UM072C-EN-P - July 2004
Get Started 1-11
Mini/Micro field-installable quick-disconnect (sealed) connectors (round
media only)
Screw terminals connect the cable to the connector. See Chapter 3 for
information about making cable connections.
blue
white
mechanical key
5
4
3
1
2
Micro Female
mechanical key
drain
red
2
1
3
4
black
5
white
blue
black
Additional configurations are available. Refer to the On-machine
Connectivity catalog, publication M115-CA001.
Catalog number
Description Thin Thick
Straight micro male 871A-TS5-DM1 n/a
Straight micro female 871A-TS5-D1 n/a
Right-angle micro male 871A-TR5-DM1 n/a
Right-angle micro female 871A-TR5-D1 n/a
Straight Mini male 871A-TS5-NM1 871A-TS5-NM3
Straight Mini female 871A-TS5-N1 871A-TS5-N3
Mini Female
drain
red
30489-M
Publication DNET-UM072C-EN-P - July 2004
1-12 Get Started
Plug-in field-installable (open) connectors
Most open-style devices ship with an open-style connector included. These
connectors are also shipped in packages of 10.
probe holes
Black
Blue
5-pin linear plug (open)
jack screwjack screw
Red
White
Shield or Bare
41707
mechanical key
Black
Blue
Black
Blue
5-pin linear to micro adapter
10-pin linear plug (open)
Red
White
Shield or Bare
Description Catalog number
mechanical key
jack screwjack screw
Red
White
Shield or Bare
41708
Publication DNET-UM072C-EN-P - July 2004
5-pin linear plug (open; with jack screws) 1799-DNETSCON
5-pin linear plug (open; without jack screws) 1799-DNETCON
10-pin linear plug (open) 1787-PLUG1OR
5-pin linear to micro male adapter 1799-DNC5MMS
2
Terminate
the Network
TR
Get Started 1-13
The terminating resistor reduces reflections of the communication signals on
the network. Choose your resistor based on the type of cable (round or flat) and
connector (open or sealed) you use.
TR
For round cable:
– the resistor may be sealed when the end node uses a sealed T-port tap
– the resistor may be open when the end node uses an open-style tap
For flat cable:
To verify the resistor connection, disconnect
power and measure the resistance across the
Can_H and Can_L lines (blue and white wires,
respectively). This reading should be
approximately 50-60Ω.
Do not put a terminating resistor on a node with
a non-removable connector. If you do so, you
risk network failure if you remove the node. You
must put the resistor at the end of the trunk line.
– the resistor is a snap-on cap for the KwikLink connector base, available
in sealed and unsealed versions
You must attach a terminating resistor of 121Ω, 1%, 1/4W or larger, to each end
of the trunk cable. You must connect these resistors directly across the blue and
white wires of the DeviceNet cable.
ATTENTION
If you do not use terminating resistors as described, the
DeviceNet cable system will not operate properly.
The following terminating resistors provide connection to taps and the trunk
line.
• sealed-style terminating resistors. Male or female connections attach to:
– trunk line ends
– T-Port taps
Female Side
Male Side
sealed male terminator
Description Catalog number
Sealed male terminator 1485A-T1M5
Sealed female terminator 1485A-T1N5
sealed female terminator
mini T-Port tap
Publication DNET-UM072C-EN-P - July 2004
41854
1-14 Get Started
Wire
Color
Wire
Identity
Usage
Round
white CAN_H signal signal
blue CAN_L signal signal
bare drain shield n/a
black V- power power
red V+ power power
Usage
Flat
• open-style terminating resistors. 121Ω, 1%, 1/4W or larger resistors
connecting the white and blue conductors in micro- or mini-style attach
to:
– open-style T-Port taps
– trunk lines using terminator blocks
121 Ω
Black
Blue
Shield or Bare
Catalog number 1485A-C2
Red
White
• KwikLink flat cable terminating resistors
The 121Ω resistor is contained in the snap-on interface module:
41827
• sealed terminator with an Insulation Displacement Connector (IDC)
base (NEMA 6P, 13; IP67) catalog number 1485A-T1E4
• unsealed terminator with IDC base (no gaskets) (NEMA 1; IP60)
catalog number 1485A-T1H4
Network end caps are included with each KwikLink terminator; see page 3-14
for complete installation instructions.
terminating resistor with end cap
30490-M
end cap
30479-M
Publication DNET-UM072C-EN-P - July 2004
power
3
Supply Power
Use the power supply to power the DeviceNet
cable system only. If a device requires a
separate 24V power source other than the
DeviceNet power source, you should use an
additional 24V power source.
supply
Get Started 1-15
Guidelines for supplying power
The cable system requires the power supply to have a rise time of less than 250
milliseconds to within 5% of its rated output voltage. You should verify the
following:
• the power supply has its own current limit protection
• fuse protection is provided for each segment of the cable system
– any section leading away from a power supply must have protection
• the power supply is sized correctly to provide each device with its
required power
• derate the supply for temperature using the manufacturer’s guidelines
DN
PS
T
u
n
r
k
drop
IMPORTANT
For thick cable and Class 2 flat cable, your national and
local codes may not permit the full use of the power system
capacity. For example, in the United States and Canada, the
power supplies that you use with Class 2 thick cable must
be Class 2 listed per the NEC and CECode. The total
node
node
power
current allowable in any section of thick cable must not
exceed 4A.
Class 1 power supplies allow for an 8A system, and the use
of Class 1 flat cable. See Appendix A for more information
about national and local codes. Appendix B, “Power
Output Devices”, provides important information to the
installer.
Choose a power supply
The total of all of the following factors must not exceed 3.25% of the nominal
24V needed for a DeviceNet cable system.
• initial power supply setting - 1.00%
• line regulation - 0.30%
• temperature drift - 0.60% (total)
• time drift - 1.05%
• load regulation - 0.30%
Publication DNET-UM072C-EN-P - July 2004
1-16 Get Started
Use a power supply that has current limit protection as described in national
codes such as NEC, Article 725.
To determine the required power supply
current:
1. Add the current requirements of all
devices drawing power from the
network.
For example:
6.3A
2. Add an additional 10% to this total
to allow for current surge.
e.g. 6.3A x 10% = 6.93A
3. Make sure the total of 2 is less
than the minimum name-plate
current of the power supply you are
using.
e.g. 6.3A < 8A and NEC/CECode
IMPORTANT
The dc output of all supplies must be isolated from the ac
side of the power supply and the power supply case.
If you use a single power supply, add the current requirements of all devices
drawing power from the network. This is the minimum name-plate current rating
that the power supply should have. We recommend that you use the
Allen-Bradley 24V dc power supply (catalog number 1787-DNPS) to comply
with the Open DeviceNet Vendor Association (ODVA) power supply
specifications and NEC/CECode Class 2 characteristics (if applicable).
About power ratings
Although the round thick cable and Class 1 flat cable are both rated to 8A, the
cable system can support a total load of more than 8A. For example, a 16A
power supply located somewhere in the middle of the cable system can supply
8A to both sides of the PowerTap™. It can handle very large loads as long as
no more than 8A is drawn through any single segment of the trunk line. However,
cable resistance may limit your application to less than 8A.
Drop lines, thick or thin, are rated to a maximum of 3A, depending on length.
The maximum current decreases as the drop line length increases.
Drop line length Allowable current
1.5m (5 ft) 3A
2m (6.6 ft) 2A
3m (10 ft) 1.5A
4.5m (15 ft) 1A
6m (20 ft) 0.75A
You may also determine the maximum current in amps (I) by using:
I = 15/L, where L is the drop line length in feet
I = 4.57/L, where L is the drop line length in meters
Publication DNET-UM072C-EN-P - July 2004
Get Started 1-17
The maximum allowable current applies to the sum of currents for all nodes on
the drop line. As shown in the example on page Page 1-7, the drop line length
refers to the maximum cable distance from any node to the trunk line, not the
cumulative drop line length.
• high maximum common mode voltage drop on the V- (black) and V+
(red) conductors
– the voltage difference between any two points on the V- conductor must
not exceed the maximum common mode voltage of 4.65V
• voltage range between V- and V+ at each node within 11 to 25V
Size a power supply
Follow the example below to help determine the minimum continuous current
rating of a power supply servicing a common section.
TR = terminating resistor
T = T-Port tap
PT = PowerTap tap
D = device
Results
power
supply 1
152m
(500 ft)
122m
(400 ft)
TRTRPT PTTT TTT
D1 D2 D3 D4 D5
1.50A 1.05A 0.25A 1.00A 0.10A
break V+ (red wire) here to separate
both halves of the network
power
supply 2
30m
(100 ft)
122m
(400 ft)
60m
(200 ft)
30m
(100 ft)
41831
Power supply 1
Add each device’s (D1, D2) DeviceNet current draw together for power supply
1 (1.50+1.05=2.55A)
2.55A is the minimum name-plate current rating that power supply 1 should
have. Remember to consider any temperature or environmental derating
recommended by the manufacturer.
IMPORTANT
This derating factor typically does not apply when you
consider the maximum short circuit current allowed by the
national and local codes.
Publication DNET-UM072C-EN-P - July 2004
1-18 Get Started
Results
Power supply 2
Add each device’s (D3, D4, D5) current together for power supply 2
(0.25+1.00+0.10=1.35A).
1.35A is the minimum name-plate current rating that power supply 2 should
have. Remember to consider any temperature or environmental derating
recommended by the manufacturer.
Place the power supply
DeviceNet networks with long trunk lines or with devices on them that draw
large currents at a long distance sometimes experience difficulty with common
mode voltage. If the voltage on the black V- conductor differs by more than 4.65
volts from one point on the network to another, communication problems can
occur. Moreover, if the voltage between the black V- conductor and the red V+
conductor ever falls below 15 volts, then common mode voltage could adversely
affect network communication. To work around these difficulties, add an
additional power supply or move an existing power supply closer to the heavier
current loads.
If possible, power supplies should be located at the middle of the network to
shorten the distance from the power supply to the end of the network.
To determine if you have adequate power for the devices in your cable system,
use the look-up method which we describe more fully in Chapter 4. See the
following example and figure (other examples follow in Chapter 4). You have
enough power if the total load does not exceed the value shown by the curve or
the table.
In a worst-case scenario, all of the nodes are assumed to be together at the
opposite end of the power supply, which draws all current over the longest
distance.
4171
IMPORTANT
This method may underestimate the total current capacity
of your network by as much as 4 to 1. See Chapter 4 to use
the full-calculation method if your supply does not fit
under the curve.
Publication DNET-UM072C-EN-P - July 2004
Current (amperes)
Get Started 1-19
A sample curve for a single, end-connected power supply is shown on the next
page.
Figure 1.1 One Power Supply (End Segment) KwikLink Cable (Flat)
NEC/CE Code Maximum
Current Limit
Network
Length
m (ft)
0 (0)
20 (66)
40 (131)
60 (197)
80 (262) 3.56
100 (328) 2.86
120 (394) 2.39
140 (459) 2.05
160 (525) 1.79
180 (591) 1.60
200 (656) 1.44
Length of trunk line, meters (feet)
Maximum
Current (A)
*
8.00
*
8.00
*
7.01
*
4.72
Network
Length
m (ft)
220 (722) 1.31
240 (787) 1.20
260 (853) 1.11
280 (919) 1.03
300 (984) 0.96
320 (1050) 0.90
340 (1115) 0.85
360 (1181) 0.80
380 (1247) 0.76
400 (1312) 0.72
420 (1378) 0.69
Maximum
Current (A)
41932
∗
Exceeds NEC CL2/CECode 4A limit.
IMPORTANT
This configuration assumes all nodes are at the opposite
end of the cable from the power supply.
Publication DNET-UM072C-EN-P - July 2004
1-20 Get Started
The following example uses the look-up method to determine the configuration
for one end-connected power supply. One end-connected power supply
provides as much as 8A near the power supply.
power
supply
106m
T
0.15A
(350 ft)
0.30A
0.10A
41833
53m
30m
23m
TR TR
TR = terminating resistor T = T-Port tap
PT = PowerTap tap D = device
(75 ft)
PT
(100 ft)
TTT
D1 D2 D3 D4
0.10A
(175 ft)
1. Determine the total length of the network.
Results
106m
2. Add each device’s current together to find the total current
consumption.
0.10 + 0.15+ 0.30 + 0.10 = 0.65A
IMPORTANT
Make sure that the required power is less than the rating of
the power supply. You may need to derate the supply if it is
in an enclosure.
3. Find the next largest network length using the table on page 1-19 to
determine the approximate maximum current allowed for the system.
120m (2.47A)
Since the total current does not exceed the maximum allowable current, the
system will operate properly (0.65A ≤ 2.47A).
IMPORTANT
If your application doesn’t fit “under the curve,” you may
either:
Publication DNET-UM072C-EN-P - July 2004
• Do the full-calculation method described in Chapter 4.
• Move the power supply to somewhere in the middle of
the cable system and reevaluate as described in the
previous section.
Get Started 1-21
Connect power supplies
To supply power you will need to install and ground the power supplies. To
install a power supply:
ATTENTION
Make sure the ac power source remains off during
installation.
1. Mount the power supply securely allowing for proper ventilation,
connection to the ac power source, and protection from
environmental conditions according to the specifications for the supply.
2. Connect the power supply using:
2
• a cable that has one pair of 12 AWG(4mm
equivalent or two pairs of 15 AWG (2.5mm
) conductors or the
2
) conductors
• a maximum cable length of 3m (10 ft) to the power tap
• the manufacturer’s recommendations for connecting the cable to the
supply
Metric sizes are for reference only. Select a wire size big enough for the maximum
current.
Publication DNET-UM072C-EN-P - July 2004
1-22 Get Started
4
Ground
the Network
power
supply
You must ground the DeviceNet network at only one location. Follow the
guidelines described below.
ATTENTION
To prevent ground loops,
• For Round media - Ground the V- conductor,
shield, and drain wire at only one place.
• For Flat media - Ground the V- conductor
at only
one place.
Do this at the power supply connection that is closest to
the physical center of the network to maximize the
performance and minimize the effect of outside noise.
Make this grounding connection using a 25 mm (1 in.)
copper braid or a #8 AWG wire up to a maximum 3m (10
ft) in length. If you use more than one power supply, the Vconductor of only one power supply should be attached to
an earth ground.
If you connect multiple power supplies, V+ should be
broken between the power supplies. Each power supply’s
chassis should be connected to the common earth ground.
To ground the network:
• Connect the network shield and drain wire to an earth or building
ground using a 25 mm (1 in.) copper braid or a 8 AWG(10mm
to 3m (10 ft) maximum in length.
• Make this ground connection using a 25mm (1 in.) copper braid or an 8
2
AWG (10mm
) wire up to3 m (10 ft) maximum in length.
• If you use more than one power supply, the V- conductor of only one
power supply should be attached to an earth ground.
ATTENTION
For a non-isolated device, be certain that additional
network grounding does not occur when you mount the
device or make external connections to it. Check the device
manufacturer’s instructions carefully for grounding
information.
2
) wire up
Publication DNET-UM072C-EN-P - July 2004
Get Started 1-23
Flat
k
CAN_H
CAN_L
drain
VV+
Round media wiring terminal block
L 1
L 2
grd
CAN_H
CAN_L
drain
VV+
V+
V-
power supply
One Power Supply
Wire
Color
Wire
Identity
Usage
Round
Usage
Flat
white CAN_H signal signal
blue CAN_L signal signal
bare drain shield n/a
black V- power power
red V+ power power
120V ac
(typical)
40186
Two or more Power Supplies for Round Media
media wiring terminal bloc
open-style connector*
CAN_
CAN_L
V-
V+
*A micro style connector may be used for
power supply connections requiring less than
4A. Use open-style connectors for up to 8A.
V-
power supply
V+
enclosure
41677
only one ground
CAN_H
CAN_L
VV+
only one ground
V+ broken between
power supplies
power supply
V+V-
Two or more Power Supplies for Flat Media
jumper
V+ broken between
power supplies
Vpower supply
V+
enclosure
V- V+
power supply
V-
power supply
40187
V+
40178
Publication DNET-UM072C-EN-P - July 2004
1-24 Get Started
5
Use the
Checklist
Use this checklist when you install the DeviceNet network. You should complete
this checklist prior to applying power to your network.
Total device network current draw does not exceed power supply
current limit.
Common mode voltage drop does not exceed limit.
Number of DeviceNet nodes does not exceed 64 on one network.
The practical limit on DeviceNet nodes may be 61 devices since
you should allow one node each for the scanner, the computer
interface module, and an open node at node 63.*
No single drop over 6m (20 ft).
Cumulative drop line budget does not exceed network baud rate
limit.
Total network trunk length does not exceed the maximum
allowable per the network data rate.
One 121Ω, 1%, 1/4W or larger terminating resistor is at each end
of the trunk line.
Ground at only one location, preferably in the center of the
network
•V- connector for flat media
• V- connector drain and shield for round media
All connections are inspected for loose wires or coupling nuts.
No opens or shorts.
Proper terminating resistors.
Publication DNET-UM072C-EN-P - July 2004
Get Started 1-25
Spacing of DeviceNet cable from ac conductors, as specified in
publication 1770-4.1.
Both the programmable controller and DeviceNet scanner module
are in run mode.
IMPORTANT
IMPORTANT
* Devices default to node 63. Leave node 63 open to avoid
duplicate node addresses when adding devices. Change the
default node address after installation.
If your DeviceNet system does not run properly, see the
scanner module’s display and network and status LEDs for
help in troubleshooting.
Publication DNET-UM072C-EN-P - July 2004
1-26 Get Started
Notes:
Publication DNET-UM072C-EN-P - July 2004
Chapter
2
Integrated Architecture Builder (IAB)
software can be used to lay out a
DeviceNet System and generate a BOM.
Download IAB from
www.ab.com/logix/iab/.
Round (Thick and Thin) Cable Network
Identify Cable System Components
Use this chapter to identify and become familiar with the basic DeviceNet
cable system components.
terminator
sealed device
T-Port tap
power
supply
thick cable
PowerTap
tap
thick cable
DevicePort tap
DeviceBox
tap (4 port)
(8 port)
thick cable
sealed device
thin cable
open-style tap
terminator
T-Port tap
KwikLink Flat Media Network
micro connector
module
power
supply
terminator
enclosure
open-style
PLC
sealed device
flat trunk
cable
open-style
modules
open-style device
20479-M
enclosure
terminator
micro connector
modules
40898
1 Publication DNET-UM072C-EN-P - July 2004
2-2 Identify Cable System Components
TIP
The catalog numbers listed in this document are not
representative of the full range of available DeviceNet
media products. For a complete list of DeviceNet media,
refer to the On-machine Connectivity Catalog,
publication M115-CA001.
Component Description Component Description
Trunk line The cable path between terminators that
Drop line The drop line is made up of thick or thin cable.
Node/device An addressable device that contains the
Terminating resistor The resistor (121 W, 1%, 1/4 W or larger)
Open-style connector Used with devices not exposed to harsh
Sealed-style
connector
T-Port tap A single-port connection with sealed connector. KwikLink Terminator A terminating resistor for use with flat cable,
represents the network backbone
- can be made of thick, thin, or flat cable
- connects to taps or directly to device
- connects taps to nodes on the network.
DeviceNet communication circuitry.
attaches only to the ends of the trunk line.
environments.
Used with devices exposed to harsh
environments.
DeviceBox tap A junction box that allows 2, 4, or 8 drop lines
DevicePort tap A junction box with sealed connectors that
PowerTap tap The physical connection between the power
Open-style tap Screw terminals that connect a drop line to the
KwikLink Micro tap A single-port connection to flat cable available
KwikLink Open-Style
tap
to connect to the trunk line.
allows 4 or 8 drop lines to connect to the trunk
line.
supply and the trunk line.
trunk line.
in both sealed and unsealed versions.
A single terminal connection to flat cable
available only in unsealed versions.
available in both sealed and unsealed versions.
Publication DNET-UM072C-EN-P - July 2004
Identify Cable System Components 2-3
About Thick Cable
Additional configurations are available.
Refer to the On-machine Connectivity
catalog, publication M115-CA001.
Class 2 Thick Cable
Spool Size Catalog Number
50 m (164 ft) 1485C-P1A50
150 m (492 ft) 1485C-P1A150
300 m (984 ft) 1485C-P1A300
500 m (1640 ft) 1485C-P1A500
Thick cable, with an outside diameter of 12.2 mm (0.48 in.), is generally
used as the trunk line on the DeviceNet network. Thick cable can be used
for trunk lines and d rop li nes. Hi gh- flex thic k cabl e offers greater flexibility
than traditional thick cable.
12.2 mm (0.48 in.) outside diameter
gray jacket
overall mylar tape
aluminum/polyester shield
over each pair
18 AWG 19 x 30 tinned copperstranded drain wire
65% coverage tinned copperbraid shield
polypropylene fillers
blue & white data-pair
foamed insulation (18AWG
19 x 30 tinned & stranded
copper conductors)
red & black dc power pair (15 AWG 19
x 28 tinned & stranded copper
conductors)
41834
About Thin Cable
Additional configurations are available.
Refer to the On-machine Connectivity
catalog, publication M115-CA001.
Class 2 Thin Cable (Yellow CPE)
Spool Size Catalog Number
50 m (164 ft) 1485C-P1C50
150 m (492 ft) 1485C-P1C150
300 m (984 ft) 1485C-P1C300
600 m (1968 ft) 1485C-P1C600
Thin cable, with an outside diameter of 6.9 mm (0.27 in.), connects devices
to the DeviceNet trunk line via taps. Thin cable can be used for trunk lines
and drop lines.
6.9 mm (0.27in) outside diameter
65% coverage tinned copper braid shield
yellow chemical
resistant jacket
overall mylar tape
aluminum/polyester shield over each pair
22 AWG 19 x 34 tinned copper-stranded
drain wire
polypropylene fillers
blue & white data-pair foamed PE/PE
insulation (24 AWG 19 x 36 tinned &
stranded copper conductors)
red & black dc power pair (22 AWG 19 x 34
tinned & stranded copper conductors)
41834
Publication DNET-UM072C-EN-P - July 2004
2-4 Identify Cable System Components
About Flat Cable
Cl1 and Cl2 cables, Auxiliary power, the blue
and white pair, and red and black pair are used
in the manner shown here.
side view
Class 1 (CL1) KwikLink Cable
Spool Size Catalog Number
75 m (246 ft) 1485C-P1E75
200 m (656 ft) 1485C-P1E200
420 m (1378 ft) 1485C-P1E420
KwikLink flat cable is physically keyed to prevent wiring mishaps.
KwikLink cable is available in both heavy-duty and general purpose
versions. All variations of KwikLink cable are unshielded and contain four
conductors. Flat cable is used exclusively for the trunk line.
red & black pair:
CL1: power pair
CL2: power pair
Auxiliary Power: power
pair for outputs
blue & white pair:
CL1: data pair
CL2: data pair
Auxiliary Power: user
defined
5.3 mm
(0.21 in.)
dc power pair 16 AWG
red
data pair 16 AWG
19.3 mm (0.76 in.)
black
bluewhite
jacket material:
CL1: gray TPE
CL2: gray PVC
Auxiliary Power: black PVC
2.50 mm
(0.10 in.)
Class 1 (CL1) Heavy-duty Cable: Per NEC specifications for a Class 1
circuit (see Appendix A), the power source must have a rated output of less
than 30V and 1000VA. Based on the size of the flat cable conductors, the
maximum current through the network must be no more than 8A. Class 1
KwikLink cable is UL listed for 600V and 8A at 24V dc. Use Class 1 drops in
conjunction with Class 1 flat cable.
30493-M
Class 2 (CL2) KwikLink Cable
Spool Size Catalog Number
75 m (246 ft) 1485C-P1G75
200 m (656 ft) 1485C-P1G200
420 m (1378 ft) 1485C-P1G420
Class 2 (CL2) Heavy-duty Cable: More flexible than the CL1 cable, this
design adheres to NEC Article 725, which states that for a Class 2 circuit, the
power source must have a rated output of less than 30V and 100VA. In the
case of DeviceNet, running at 24V, the maximum allowable current is
100VA/24V or 4A. KwikLink CL2 cable is rated to 4A at 24V dc.
Publication DNET-UM072C-EN-P - July 2004
Identify Cable System Components 2-5
Class 2 (CL2) KwikLink General
Purpose Cable
Spool Size Catalog Number
75 m (246 ft) 1485C-P1K75
200 m (656 ft) 1485C-P1K200
420 m (1378 ft) 1485C-P1K420
Class 1 (CL1) KwikLink Power Cable
Spool Size Catalog Number
75 m (246 ft) 1485C-P1L75
200 m (656 ft) 1485C-P1L200
420 m (1378 ft) 1485C-P1L420
Connect to the Trunk Line
Class 2 (CL2) General Purpose Cable: Well-suited for less-demanding
applications than heavy-duty cable, this design features a micro-style connector
(catalog number 1485P-K1E4-R5) optimized for use with this pliable cable.
IMPORTANT
1485-P1Kxxx cable cannot be used with KwikLink
heavy-duty connectors.
KwikLink Power Cable (CL1): Used to run an auxiliary bus to power
outputs, i.e. valves, actuators, indicators. KwikLink power cable is a Class 1
cable capable of supplying 24V of output power with currents up to 8A.
TIP
The ArmorBlock MaXum cable base, 1792D-CBFM, is
designed to use both the KwikLink network and Auxiliary
Power cables. Use this cable base with all ArmorBlock
MaXum output modules.
The cable system design allows you to replace a device without disturbing the
cable system’s operation.
IMPORTANT
You must terminate the trunk line on each end with a 121
Ω, 1%, 1/4W or larger resistor.
Publication DNET-UM072C-EN-P - July 2004
2-6 Identify Cable System Components
You can connect to the trunk line through a:
Trunk-line connection See page Trunk-line connection See page
• T-Port tap
2-7
• DeviceBox tap
2-8
• PowerTap
power
supply
• Thru-trunk DevicePort tap
• Open-style tap
31410-M
41868
41867
2-9
• DevicePort tap
2-9
41869
2-12 Open-style connector 2-13
41708
2-13
• KwikLink open-style connector
2-15
• KwikLink micro connector
Publication DNET-UM072C-EN-P - July 2004
30849-M
2-15
Description Catalog Number
Mini T-port tap
1485P-P1N5-MN5R1
(right keyway)
Mini T-port tap (left
1485P-P1N5-MN5L1
keyway)
Mini T-port tap
1485P-P1R5-MN5R1
(w/micro drop
connection
Identify Cable System Components 2-7
About the T-Port tap
The T-Port tap connects to the drop line with a mini or micro
quick-disconnect style connector. Mini T-Port taps provide right or left keyway
for positioning purposes. Mini T-Ports are also available with a micro (M12)
drop connection.
Mini T-Port tap
Right keyway
blue
drain
white
Female Connector
End View
white
blue
drain
red
black
Description Catalog Number
Micro T-port tap 1485P-P1R5-DR5
red
black
Micro T-Port tap
Keying Information
68.83 mm
(2.71 in.)
35.05 mm
(1.38 in.)
49.27 mm
(1.94 in.)
Left keyway
drain
red
drain
blue
blue
red
white
Male Connector
End View
white
black
black
41835
34
21
Male (pins)
34
5
21
Female (sockets)
1 - Drain
2 - V+
3 - V4 - CAN_H
5 - CAN_L
bare
red
black
white
blue
30428-M
5
male connectors
17 mm
(0.70 in.)
female connectors
10 mm
(0.39 in.)
23 mm
(0.92 in.)
40 mm
(1.58 in.)
30164-M
Publication DNET-UM072C-EN-P - July 2004
2-8 Identify Cable System Components
Description Catalog Number
2-port DeviceBox
1485P-P2T5-T5
tap (thick trunk)
2-port DeviceBox
1485P-P2T5-T5C
tap (thin trunk)
4-port DeviceBox
1485P-P4T5-T5
tap (thick trunk)
4-port DeviceBox
1485P-P4T5-T5C
tap (thin trunk)
8-port DeviceBox
1485P-P8T5-T5
tap (thick trunk)
8-port DeviceBox
1485P-P8T5-T5C
tap (thin trunk)
About the DeviceBox tap
DeviceBox taps use round media only for a direct connection to a trunk line.
They provide terminal strip connections for as many as 8 nodes using
thin-cable drop lines. Removable gasket covers and cable glands provide a
tight, sealed box that you can mount on a machine. Order DeviceBox taps
according to the trunk type (thick or thin).
43 mm
(1.7 in.)
2-Port DeviceBox Tap
67 mm
(2.6 in.)
98 mm
(3.9 in.)
98 mm
(3.9 in.)
111m
(4.4 in.)
197 mm
(7.8 in.)
209 mm
(8.2 in.)
4-Port DeviceBox Tap
67 mm
(2.6 in.)
98 mm
(3.9 in.)
48 mm
(1.9 in.)
197 mm
(7.8 in.)
209 mm
(8.2 in.)
8-Port DeviceBox Tap
67 mm
(2.6 in.)
48 mm
(1.9 in.)
98 mm
(3.9 in.)
41836
Publication DNET-UM072C-EN-P - July 2004
Description Catalog Number
Thick trunk
PowerTap tap
Thin trunk
PowerTap tap
1485-P2T5-T5
1485T-P2T5-T5C
Identify Cable System Components 2-9
About the PowerTap
The PowerTap can provide overcurrent protection to the thick cable, 7.5A for
each trunk. (Country and/or local codes may prohibit the use of the full
capacity of the tap.) You can also use the PowerTap tap with fuses to connect
multiple power supplies to the trunk line without back-feeding between
supplies. PowerTap taps are used only with round media.
PowerTap tap
screw, 5/16 lb.
sub-assembly PCB
PG16 cable grips
enclosure
98 mm
(3.9 in.)
Additional configurations are available.
Refer to the On-machine Connectivity
catalog, publication M115-CA001.
Description Catalog Number
4-port DevicePort
tap with 2m drop
line
8-port DevicePort
tap with 2m drop
line
1485P-P4R5-C2
1485P-P8R5-C2
schematic
67 mm
(2.6 in.)
98 mm
(3.9 in.)
111 mm
(4.4 in.)
CAN_H
CAN_L
bare
VV+
V-
V+
power supply
Wire
Color
white CAN_H signal
blue CAN_L signal
bare drain shield
black V- power
red V+ power
Wire
identity
In cases in which the power supply provides current limiting and inherent
protection, you may not need fuses/overcurrent devices at the tap.
About the DevicePort tap
DevicePort taps are multiport taps that connect to a round or flat media trunk
line via drop lines. DevicePorts connect as many as 8 devices to the network
through mini or micro quick disconnects.
Micro DevicePorts
All device connections are micro female receptacles; only micro male
connectors with rotating coupling nuts can interface with each port. A number
of trunk connection style options are available.
Use
41837
Publication DNET-UM072C-EN-P - July 2004
2-10 Identify Cable System Components
4-Port DevicePort Tap with 2m Drop Line
5-pin fixed internal thread
micro-female connector
J1
5.5 Dia. (0.22 mm)
J2
48 mm
(1.9 in.)
59 mm
(2.3 in.)
thin cable (2m)
8-Port DevicePort Tap with 2m Drop Line
5-pin fixed internal thread
thin cable (2m)
J3
30 mm
(1.2 in.)
J1 J2 J3
J5 J6 J7 J8
30 mm
(1.2 in.)
44 mm
(1.7 in.)
44 mm
(1.7 in.)
98 mm
(3.9 in.)
88 mm
(3.5 in.)
187 mm
(7.4 in.)
J4
5.5 Dia. (0.22 mm)
J4
48 mm
(1.9 in.)
41838
59 mm
(2.3 in.)
41839
Publication DNET-UM072C-EN-P - July 2004
Description Catalog Number
4-port DevicePort
tap with mini drop
connection
8-port DevicePort
tap with mini drop
connection
1485P-P4N5-M5
1485P-P8N5-M5
Identify Cable System Components 2-11
Mini DevicePorts
All device connections are mini female receptacles; only mini male connectors
can interface with each port. Trunk connection is a mini male quick
disconnect.
4-Port DevicePort tap with mini drop connection
5-pin mini female
connectors
J1
J2
5-pin mini male
connector
5-pin mini male
connector
BA
J3
30 mm
(1.2 in.)
8-Port DevicePort Tap part number
5-pin mini female connectors
J1 J2 J3 J4
J5
30 mm
(1.2 in.)
J6 J7
44 mm
(1.7 in.)
44 mm
(1.7 in.)
98 mm
(3.9 in.)
187 mm (7.4 in.)
48 mm
(1.9 in.)
J4
5-pin mini female
connectors
30495-M
48 mm
(1.9 in.)
J8
30494-M
Publication DNET-UM072C-EN-P - July 2004
2-12 Identify Cable System Components
Description Catalog Number
4-port Thru-trunk
1485P-P4N5-MN5
DevicePort tap,
mini male/mini
female to mini
female
6-port Thru-trunk
1485P-P6N5-MN5
DevicePort tap,
mini male/mini
female to mini
female
4-port Thru-trunk
1485P-P4R5-MN5
DevicePort tap,
mini male/mini
female to micro
female
6-port Thru-trunk
1485P-P6R5-MN5
DevicePort tap,
mini male/mini
female to micro
female
Thru-trunk DevicePort tap
Thru-trunk DevicePort taps are passive multiport taps which connect directly
to the trunk. These DevicePort taps are offered with 4 or 6 quick-disconnect
ports in sealed versions to connect up to 6 physical nodes.Using the thru-trunk
DevicePort tap reduces the number of physical taps on the trunk line from as
many as six taps to one.
60.2 (2.37)
5-Pin Mini
Male
5.59 (0.22)
Dia Mtg.
Holes
187.2
(7.37)
88.9
(3.5)
49.0
(1.93)
22.1 (1.87)
2
314
5 6
5-Pin Mini
Female
5-Pin Mini
Male
5.59 (0.22)
Dia Mtg.
Holes
142.75
(5.62)
44.4
(1.75)
49.0
(1.93)
60.2 (2.37)
22.1 (1.87)
1 2
3 4
5-Pin Mini
Female
5-Pin Micro
Female
6-port mini thru-trunk
DevicePort
4-port micro thru-trunk
DevicePort
Publication DNET-UM072C-EN-P - July 2004
trunk line
disconnect
here
drop line
31411-M
device with
fixed
open-style
connector
Identify Cable System Components 2-13
About direct connection
Connect devices directly to the trunk line only if you can later remove the
devices without disturbing communications on the cable system.
IMPORTANT
If a device provides only fixed-terminal blocks for its
connection, you must connect it to the cable system by a
drop line. Doing this allows you to remove the device at the
tap without disturbing communications on the cable
system.
Wire
Color
white CAN_H signal
blue CAN_L signal
bare drain shield
black V- power
red V+ power
Wire
Identity
Usage
Round
Black
Blue
5 pin linear plug (open)
About open-style connectors
Open-style connectors come in two primary varieties:
• five-position (5 pin linear plug)
• ten-position (10 pin linear plug)
Ten-position connectors provide easier daisy-chaining because there is an
independent wire chamber for each wire (entering cable and exiting cable).
probe holes
jack screwjack screw
Red
White
Shield or Bare
41707
mechanical key
Black
Blue
10-pin linear plug (open)
mechanical key
jack screwjack screw
Red
White
Shield or Bare
41708
Black
Blue
5-pin linear to micro adapter
Red
White
Shield or Bare
Publication DNET-UM072C-EN-P - July 2004
2-14 Identify Cable System Components
Description Catalog number
5-pin linear plug (open; with jack screws) 1799-DNETSCON
5-pin linear plug (open; without jack screws) 1799-DNETCON
10-pin linear plug (open) 1787-PLUG1OR
5-pin linear to micro adapter 1799-DNC5MMS
Some open-style connectors provide a temporary connection for a PC or other
configurable tool using probe holes. For connection, insert the prongs of a
probe cable into the probe holes of a connector. Mechanical keys on the
connector prevent improper insertion.
insert probe cable
probe holes
into probe holes of
connector
to PC
probe cable
Description Catalog Number
Open-style tap 1492-DN3TW
generic
unsealed
device
41864
prongs
mechanical
key
41863
About open-style taps
Open-style taps provide a way for drop cables to be connected to the trunk
line using open-style wiring connections. Three sets of 5-position color-coded
wiring chambers accommodate all wires (for entering trunk cable, exiting trunk
cable, and drop cable). The open-style tap can be mounted on a DIN rail.
jack screw
mounting
plate
Red
White
Shield
or Bare
Blue
Black
jack screw
mounting plate
30849-M
Publication DNET-UM072C-EN-P - July 2004
Jack screws on open-style taps and connectors provide additional physical
support.
Description Catalog Number
NEMA 6P, 13; IP67
Micro module
w/base
NEMA 1; IP60
Micro module
w/base (no
gaskets)
Open-style module
w/base (no
gaskets)
KwikLink General
Purpose Connector,
1
Micro
1
Use this connector also with KwikLink General
Purpose Flat Cable (1485C-P1K).
1485P-P1E4-R5
1485P-P1H4-R5
1485P-P1H4-T4
1485P-K1E4-R5
Identify Cable System Components 2-15
About KwikLink Insulation Displacement Connectors (IDCs)
KwikLink Insulation Displacement Connectors (IDCs) interface drop cables
and devices to the flat cable trunkline. The hinged, two-piece base snaps
around the flat cable at any point along the trunk. Contact is made with the
cable conductors by tightening two screws that drive the contacts through the
cable jacket and into the conductors. The snap-on interface provides the
connection to the drop cable and is available in micro-, open-, and
general-purpose style connectors.
Allen-Bradley KwikLink connectors are approved only with the following
DeviceNet flat cables:
Catalog Number Description
1485C-P1E CL1
1485C-P1L Aux. Power
1485C-P1G CL2
V+
CAN_H
40 mm
(1.58 in.)
45 mm
(1.75 in.)
36 mm
(1.40 in.)
CAN_L
49 mm
(1.93 in.)
41711
V-
40 mm
(1.58 in.)
45 mm
(1.75 in.)
36 mm
(1.40 in.)
49 mm
(1.93 in.)
41717
Publication DNET-UM072C-EN-P - July 2004
2-16 Identify Cable System Components
Use Preterminated Cables
Additional configurations are available.
Refer to the On-machine Connectivity
catalog, publication M115-CA001.
Description Catalog Number
Mini male to mini
female
Mini male to
conductor
Mini female to
conductor
x indicates length in meters (1-10, 12, 15,
18, 24 and 30 are standard).
1485C-PxN5-M5
1485C-PxM5-C
1485C-PxN5-C
Using preterminated cable assemblies saves you the effort of stripping and
wiring connectors to the cable ends. Because pre-terminated cables are
normally factory-tested, using them also helps reduce wiring errors.
TIP
Additional cable lengths and configurations, other than
those shown, are available from Rockwell Automation.
About thick cable
You can order thick cable in multiple lengths with mini connectors at each end.
Single-ended versions are also available for simplified connection to
DeviceBox or open-style connections. Thick cable that is 6m (20ft) or shorter
can also be used as drop lines.
mini T-Port tap
male plug
rotating
coupling
nut
specified length
female plug
thick cable
specified
length
mini T-Port tap
rotating
coupling
nut
thick cable
Publication DNET-UM072C-EN-P - July 2004
41718
About thin cable
Identify Cable System Components 2-17
Additional configurations are available.
Refer to the On-machine Connectivity
catalog, publication M115-CA001.
Class 2 Preterminated Thin Cable
Description Catalog Number
Mini male to
mini female
Mini male to
micro female
Mini male to
conductor
x indicates length in meters (1-6 is
standard).
1485R-PxM5-M5
1485R-PxM5-M5-R5
1485R-PxM5-C
Preterminated thin cable assemblies for use as a drop line are available with
various connectors in lengths of 1, 2, 3, 4, 5 and 6m. Preterminated thin cable
assemblies can also be used as trunk lines.
Connecting to a T-Port tap from a sealed device
specified length
device
device
30488-M
T-Port tap
Mini male plug
T-Port tap
Mini male plug
Mini female plug
thin cable
specified length
Micro female plug
thin cable
Connecting to a T-Port tap from an open device
specified length
Mini male plug
T-Port tap
thin cable
conductor
device
41719
Publication DNET-UM072C-EN-P - July 2004
2-18 Identify Cable System Components
Connecting to a DevicePort tap or Micro T-Port tap from a sealed device
Additional configurations are available.
Refer to the On-machine Connectivity
catalog, publication M115-CA001.
Description Catalog Number
Micro male 90°
to mini female
Micro male 90°
to micro female
Mini female to
conductor
Micro female to
conductor
x indicates length in meters (1- 6 is
standard)
1485R-PxN5-F5
1485R-PxR5-F5
1485R-PxN5-C
1485R-PxR5-C
specified length
90°micro male plug
thin cable
to DevicePort tap, or micro T-Port tap
specified length
90°micro male plug
thin cable
to DevicePort tap, or micro T-Port tap
mini female plug
micro female plug
device
device
Connecting to a DeviceBox tap or open-style tap from a sealed device
41720
specified length
stripped conductors (pigtails)
to DeviceBox tap
specified length
stripped conductors (pigtails)
to DeviceBox tap
thin cable
thin cable
female plug
female plug
device
device
41721
Publication DNET-UM072C-EN-P - July 2004
Connecting to micro T-Port taps
Identify Cable System Components 2-19
Additional configurations are available.
Refer to the On-machine Connectivity
catalog, publication M115-CA001.
Description Catalog Number
Micro male 90°
to micro female
Micro male to
micro female
x indicates length in meters (1- 6 is
standard)
1485R-PxR5-F5
1485R-PxR5-D5
device
drop lines
thin cable
specified
length
trunk line
device
30163-M
About KwikLink drop cables
These unshielded four-wire PVC drop cables were designed specifically for use
with KwikLink connectors. Trunkline connections are 90° micro male to
straight female, micro female or conductors at the device.
IMPORTANT
These drop cables (1485K) are for use only with the
KwikLink flat cable system. They are not suitable for use
with standard DeviceNet round cable systems.
Publication DNET-UM072C-EN-P - July 2004
2-20 Identify Cable System Components
Connecting to a KwikLink tap from a sealed device
Additional configurations are available.
Refer to the On-machine Connectivity
catalog, publication M115-CA001.
Description Catalog Number
Micro male 90°
to micro female
Micro male 90°
to mini female
x indicates length in meters (1- 6 is
standard)
1485K-PxF5-R5
1485K-PxF5-N5
specified length
90°micro male plug
thin cable
to KwikLink Micro
specified length
90°micro male plug
thin cable
to KwikLink Micro
micro female plug
mini female plug
Connecting to a KwikLink tap from an open device
device
device
41720
Additional configurations are available.
Refer to the On-machine Connectivity
catalog, publication M115-CA001.
Description Catalog Number
Micro male 90°
to conductors
x indicates length in meters (1, 2, 4 and
6 are standard)
1485K-PxF5-C
90°micro male plug
to KwikLink Micro
specified length
conductor
device
41631
Publication DNET-UM072C-EN-P - July 2004
Identify Cable System Components 2-21
Connecting to a KwikLink Cable Drop or Mini-style Pigtail Drop
Specified Length
Additional configurations are available.
Refer to the On-machine Connectivity
catalog, publication M115-CA001.
Cable Length Catalog Number
Class 1 KwikLink
1485T-P1E4-Bx
sealed cable pigtail
drop cable
Class 1 KwikLink
1485T-P1H4-Bx
unsealed cable
pigtail drop cable
Class 1 KwikLink
1485P-P1E4-Bx-N5
sealed 5-pin mini
pigtail drop cable
Class 1 KwikLink
1485P-P1H4-Bx-N5
unsealed 5-pin
mini pigtail drop
cable
x indicates length in meters (1- 6 is
standard)
Mini Style Pigtail
Red
Green
White
Black
Cable Drop
10mm (0.39)
Tap/Drop Cap
IDC Connector
Connecting to a KwikLink Auxiliary Power Cable
45
(1.75)
49
(1.93)
59
(2.32)
59
(2.32)
Additional configurations are available.
Refer to the On-machine Connectivity
catalog, publication M115-CA001.
Cable Length Catalog Number
Class 1 KwikLink
1485T-P1E4-Cx
auxiliary power
cable pigtail
Class 1 KwikLink
1485T-P1E4-Cx-N4
auxiliary power
4-pin mini pigtail
x indicates length in meters (1, 2, 3 and 6
are standard)
Mini Style Pigtail
Red
Green
White
Black
Cable Drop
10mm (0.39)
Specified Length
Tap/Drop Cap
IDC Connector
59
49
(2.32)
(1.93)
59
(2.32)
45
(1.75)
Publication DNET-UM072C-EN-P - July 2004
2-22 Identify Cable System Components
About terminators
Wire
Color
white CAN_H signal signal
blue CAN_L signal signal
bare drain shield n/a
black V- power power
red V+ power power
Description Catalog Number
Mini male 1485A-T1M5
Mini female 1485A-T1N5
Micro male 1485A-T1D5
Micro female 1485A-T1R5
Wire
Identity
Usage
Round
Usage
Flat
Electrically stabilize your DeviceNet communication with terminating
resistors.
IMPORTANT
You must terminate the trunk line on each end with a
121ohms, 1%, 1/4W or larger resistor.
Sealed-style terminators (round media)
Male and female sealed terminators have gold plated contacts for corrosion
resistance.
mini style
male
female
micro style
male
female
Description Catalog Number
Open-style
terminator
1485A-C2
Unsealed-Style terminator (round and flat media)
IMPORTANT
An open-style terminator is suitable for use with:
• DeviceBox taps
• open-style plugs or taps
• KwikLink open-style Insulation Displacement Connectors (IDC)
You must connect these resistors directly across the blue
and white wires of the DeviceNet cable.
121ohms
41870
KwikLink IDC with
open-style terminator
41873
Publication DNET-UM072C-EN-P - July 2004
Identify Cable System Components 2-23
Sealed and unsealed flat media terminators
These terminators have an IDC base and are shipped with an end cap.
Unsealed terminators do not have gaskets.
Description Catalog Number
Sealed terminator
(IP67)
Unsealed
terminator
(no gasket IP60)
1485A-T1E4
1485A-T1H4
end cap
30490
Publication DNET-UM072C-EN-P - July 2004
2-24 Identify Cable System Components
Notes:
Publication DNET-UM072C-EN-P - July 2004
Make Cable Connections
Chapter
3
Prepare Cables
In Chapter 1, you determined the required lengths of trunk line and drop line
segments for your network. To cut these segments from reels of thick, thin and
flat cable, use a sharp cable cutter and provide sufficient length in each
segment to reduce tension at the connector.
TIP
IMPORTANT
TIP
Select an end of the cable segment that has been cleanly
cut. The positions of the color-coded conductors should
match the positions at the face of the connector.
Before beginning, make sure:
• the DeviceNet cable system is inactive
• all attached devices are turned off
• any attached power supply is turned off
• you follow the manufacturer’s instructions for
stripping, crimping, and/or tightening
Adhere to the cable routing and spacing guidelines
described in Industrial Automation Wiring and Grounding
Guidelines, publication 1770-4.1.
TIP
1 Publication DNET-UM072C-EN-P - July 2004
The catalog numbers listed in this document are
representative of the full range of available DeviceNet
media products. For a complete list of DeviceNet media,
refer to the On-machine Connectivity Catalog,
publication M115-CA001.
3-2 Make Cable Connections
6.4
Install Open-Style
Connectors
To attach a plug-in open-style connector to a round media (thick or thin) trunk
line:
1. Strip 65 mm (2.6 in.) to 75 mm (2.96 in.) of the outer jacket from the
end of the cable, leaving no more than 6.4 mm (0.25 in.) of the braided
shield exposed.
mm
(0.25 in.)
jacket
braided shield
65 mm (2.6 in.)
41840
2. Wrap the end of the cable with 38 mm (1.5 in.) of shrink wrap, covering
part of the exposed conductors and part of the trunk line insulation.
38 mm
jacket
(1.5 in.)
shrink wrap
41841
3. Strip 8.1 mm (0.32 in.) of the insulation from the end of each of the
insulated conductors.
jacket
shrink wrap
8.1 mm
(0.32 in.)
41842
4. Tin the last 6.5 mm (0.26 in.) of the bare conductors so that the outside
dimension does not exceed 0.17 mm (0.045 in.).
5. Insert each conductor into the appropriate clamping cavity of the
open-style connector or the screw terminal on the device, according to
the color of the cable insulation.
Publication DNET-UM072C-EN-P - July 2004
Make Cable Connections 3-3
Wire
Color
Wire
Identity
Usage
Round
white CAN_H signal
blue CAN_L signal
bare drain shield
black V- power
red V+ power
Install Mini/Micro Sealed
6. Tighten the clamping screws
clamping screws
to secure each conductor.
The male contacts of the
device connector must match
the female contacts of the
connector.
open-style connector
(female contacts)
blue
black
open-style receptacle
(female contacts)
bare white
red
white
bare
blue
black
open-style connector
(female connector)
To attach a mini/micro sealed-style connector to round media:
red
white
bare
blue
black
red
30427-M
Field-Installable
Connectors
Wire
Color
white CAN_H signal
blue CAN_L signal
bare drain shield
black V- power
red V+ power
Wire
identity
Usage
Round
1. Prepare the cable jacket by cleaning loose particles from the jacket.
70mm
jacket
clean jacket
(2.75 in.)
29 mm
(1.165 in.)
41849
2. Strip 29 mm (1.165 in.) of the cable jacket from the end of the cable.
3. Cut the braided shield and the foil shields surrounding the power and
signal conductors.
4. Trim the conductors to the same length.
5. Slide the connector hardware
onto the cable in the order
shown.
6. Strip 9 mm (0.374 in.) of
insulation from the ends of
all conductors except the
bare drain wire.
IMPORTANT
Do not twist or pull the cable while tightening the gland
rear nut
Do not nick the
conductor strands.
rubber washer
grommet enclosure
bevelled side
slide hardware
9 mm
(0.374 in.)
41850
nut.
Publication DNET-UM072C-EN-P - July 2004
3-4 Make Cable Connections
7. Attach wires to the connector using screw terminals as seen in the
following diagram.
signal conductors
Rear View
power conductors
bare
The following illustration shows a mini male and female
connector. Connections are similar for micro connectors.
female connector
power conductors
signal condctors
Rear View
male connector
black
red
bare
TIP
white
blue
8. Screw the enclosure body to the connector.
9. Screw the rear nut into the connector enclosure.
IMPORTANT
Do not twist or pull the cable while tightening the rear nut.
bare
white
blue
black
red
bare
41848
Install DeviceBox and
PowerTap Taps
Cable preparation and attachment is the same for PowerTap taps and
DeviceBox taps which use hard-wire connections of round media. To install
your taps, perform the following steps and then proceed to the appropriate
section for wiring the specific tap.
1. Remove the cover from the tap.
2. Prepare the ends of the cable sections.
a. Strip 65 mm (2.6 in.) to 76 mm (3 in.) of the outer jacket
and braided shield from the end of the cable.
76 mm
jacket
(3 in.)
41843
b. Leave no more than 6.4 mm (0.25 in.) of the braided shield exposed.
6.4 mm
(0.25 in.)
braided shield
41844
Publication DNET-UM072C-EN-P - July 2004
Make Cable Connections 3-5
c. Strip 8.1 mm (0.32 in.) of the insulation from the end of each of the
insulated conductors.
heat shrink
8.1 mm
(0.32 in.)
41845
3. Attach cables to the enclosure.
a. Loosen the large gland nuts.
b. Insert cables through the large cable glands so that about 3.3 mm
(0.13 in.) of the cable jackets extend beyond the locking nut toward
the inside of the enclosure.
c. Hold the hex flange in place with the cable gland wrench, and firmly
tighten the gland nut. The cable gland wrench is supplied with the
accessories kit, part number 1485A-ACCKIT.
cable gland wrench
20480-M
4. Go to the appropriate section.
Install PowerTap Taps
For information about See page
installing PowerTap taps 3-5
installing DeviceBox taps 3-8
installing DevicePort taps 3-9
The PowerTap tap contains terminal blocks that connect the trunk line
conductors and the input from a power supply. It is used only with round
media. Gland nuts secure cables to the PowerTap enclosure.
IMPORTANT
As you make the attachments inside the tap, be certain that:
• conductors inside the enclosure loop around the fuses
for easy access to the fuses.
• the bare conductor is insulated in the enclosure with
the insulating tubing supplied in the accessory kit.
• the blue plastic covers are firmly attached to the fuse
assemblies before applying power.
Publication DNET-UM072C-EN-P - July 2004
3-6 Make Cable Connections
M
Wire
Color
Wire
identity
Use
white CAN_H signal
blue CAN_L signal
bare drain shield
black V- power
red V+ power
IMPORTANT
The two fuses used in the PowerTap tap are 7.5A
fast-acting automotive type (ACT type), which you can
order from your local fuse supplier.
To attach a PowerTap:
1. Cut and strip the thick cable back approximately 100 mm
(4 in.).
100mm (4 in)
31512-
2. Loosen the gland nut.
red
black
drain
white
red
drain
blue
black
blue
drain
black
white
red
41757
3. Insert the cable into the PowerTap through the large cable gland until
approximately 3 mm (0.12 in.) of the cable jacket protrudes.
TIP
Cable used for input from a power supply should have the
white and blue leads cut off short.
4. Firmly tighten the gland nut to provide strain relief and sealing.
ATTENTION
You must hold the hex flange with the cable gland wrench
during tightening.
Publication DNET-UM072C-EN-P - July 2004
Make Cable Connections 3-7
5. Firmly twist the bare wire ends to eliminate loose strands.
trunk
ATTENTION
Be certain that you use insulating tubing (included with the
accessory kit) on bare drain wire.
6. Loop each bare wire as shown below so you may insert the terminal
block into the clamping cavity.
PowerTap Tap - 1485T-P2T5-T5
power supply
trunk
41758
7. Firmly tighten the terminal block screw to clamp the bare wire end in
place.
8. After all cables are terminated, secure the cover and tighten the screws
to obtain the washdown rating.
9. Tighten all wire glands.
Publication DNET-UM072C-EN-P - July 2004
3-8 Make Cable Connections
Install DeviceBox Taps
Wire
Color
white CAN_H signal
blue CAN_L signal
bare drain shield
black V- power
red V+ power
Wire
identity
Use
The DeviceBox tap contains terminal blocks that connect the trunk line and as
many as eight drop lines. It is used only with round media. Gland nuts secure
the cables entering the ports of the DeviceBox tap.To attach a DeviceBox tap:
1. Cut the required lengths from reels of trunk line using a sharp cable
cutter providing sufficient length in each segment to reduce tension at
the connection.
IMPORTANT
Cover the bare drain wire in the enclosure with the
insulating tubing supplied in the accessory kit.
2. Insert conductors into the terminal block clamping cavities, following
the color coding specified for the terminal blocks at the incoming and
outgoing thick cables and as many as eight thin cables.
thin cable terminal blocks
black
blue
drain
white
red
black
blue
drain
white
red
black
blue
drain
white
red
black
blue
drain
white
red
red
white
drain
blue
black
red
white
drain
blue
black
red
white
drain
blue
black
red
white
drain
blue
black
drop lines
(thin cable)
trunk line
(thick cable)
thick cable terminal blocks
plug
and nut
locking nut
hex flange
gland nut
blue
white
blue
black
drain
red
white
drain
trunk line
(thick cable)
plug and nut
drop lines
(thin cable)
41851
red
black
Publication DNET-UM072C-EN-P - July 2004
3. Tighten all clamping screws to secure conductors to the terminal blocks.
4. Seal unused ports with nylon plugs and nuts in the accessory kit.
5. Tightly secure the cover to the enclosure.
Make Cable Connections 3-9
Install DevicePort Taps
Connect Drop Lines
The DevicePort tap connects as many as eight quick-disconnect cables to the
trunk line.
J1 J2 J3 J4
2 m (6.56 ft)
J8J7J6J5
41852
Drop lines, made up of thick or thin cable, connect devices to taps.
Connections at the device can be:
• open-style
– pluggable screw connectors
– hard-wired screw terminals
– soldered
• sealed-style
– mini quick-disconnect connectors
– micro quick-disconnect connectors
ATTENTION
Although it is possible to make a screw-terminal
connection while the cable network is active, you should
avoid this if at all possible.
IMPORTANT
It is best to connect drop lines when the cable system is
inactive. If you must connect to an active cable system,
make all other connections before the connection to the
trunk line.
To connect drop lines:
1. Attach contacts as described earlier in this section.
2. Connect the cable to the device.
3. Make any intermediate connections.
Publication DNET-UM072C-EN-P - July 2004
3-10 Make Cable Connections
4. Make the connection to the trunk line last.
Install KwikLink Cable and
KwikLink Heavy-Duty
Connectors
Class 1 (CL1) KwikLink Cable
Spool Size Catalog Number
75 m (246 ft) 1485C-P1E75
200 m (656 ft) 1485C-P1E200
420 m (1378 ft) 1485C-P1E420
IMPORTANT
Follow the wiring diagrams for each connection, and make
sure you do not exceed the maximum allowable length
from the device connection to the trunk connection.
Install KwikLink cable with the wider, flat edge of the cable on the bottom.
keyed edge
flat edge
41607
Follow these steps to properly install KwikLink cable into a connector:
IMPORTANT
1485-P1Kxxx cable cannot be used with KwikLink
heavy-duty connectors.
1. Lay the cable in the hinged base, paying attention to the keyed profile.
The unkeyed edge is closer to the hinge; the keyed edge is toward the
latch.
Class 2 (CL2) KwikLink Cable
Spool Size Catalog Number
75 m (246 ft) 1485C-P1G75
200 m (656 ft) 1485C-P1G200
420 m (1378 ft) 1485C-P1G420
IMPORTANT
Prior to closing the connector, make sure the IDC blades
do not protrude from the housing. If the blades are
exposed, gently push them back into the base. In the event
that the blades do not retract easily (or retract only
partially), verify that the IDC screws are not partially
driven.
keyed edge is toward
the latch
latch
30474-M
Publication DNET-UM072C-EN-P - July 2004
Make Cable Connections 3-11
2. Close the hinged assembly, applying pressure until the latch locks into
place.
IMPORTANT
The latch has two catches. The first catch loosely holds the
connector on the cable. The second catch needs more
pressure applied to close the connector tightly. If the cable
is not in the correct position, the connector will not close.
3. Make sure the cable is straight before moving on to step four.
30475-M
30492-M
ATTENTION
You must make sure the cable is straight before tightening
the screws. Improper seating of the cable may cause a weak
seal and impede IP67 requirements. A mis-aligned cable
may also cause shorts due to the mis-registration of the
IDC contacts.
4. Tighten down the two screws at the center points of the hinge and latch
sides of the base; tighten down the latch side first.
IMPORTANT
Take care to avoid stripping the screws. Ample torque
should be 5.56 N (15 in-lbs).
5. Mount the base to the panel by driving screws through the corner holes
not containing the metal inserts.
Publication DNET-UM072C-EN-P - July 2004
3-12 Make Cable Connections
Check the cable position prior
to tightening the screws.
Tighten screws by the
latch first
30476-M
6. Drive the IDC contacts into the cable by tightening down the two
screws in the center of the base assembly. .
The module should not be removed
after connection is made. Determine
the exact placement of the
connector before engaging the IDC
contacts.
IMPORTANT
Take care to avoid stripping the screws. Ample torque
should be 5.56 N (15 in-lbs).
ATTENTION
Once the IDC contacts are driven into
the cable, the module should not be
removed.
Connectors are single-use only and
cannot be removed or re-used.
7. Follow these guidelines for installing the connectors:
• We recommend you only install the connectors at temperatures of
0°C to 75°C.
• Make sure the cable is free of debris or scratches before attaching the
connector to ensure a proper seal.
• The recommended distance between mounts is 3-5 m (10-16 ft). To
mount flat cable, use flat cable mount 1485A-FCM.
• When running cable into an enclosure, use flat cable gland
1485A-CAD.
• Connectors are designed for single use and cannot be reused. Once
installed, connectors should not be removed from the trunkline.
30477-M
Publication DNET-UM072C-EN-P - July 2004
Make Cable Connections 3-13
8. Line up the keyed rectangular holes of the micro/open/terminator
connection interface with the matching posts on the base and snap the
micro module into place. Optional: Secure the micro/open/terminator
module by driving an 8-32 x 1-3/4 screw through each of the two
remaining mounting holes.
TIP
When using the cable in applications with a large amount
of flexing, secure the cable to a fixed reference point, using
an 8-32 x 1-3/4 screw through each of the two remaining
mounting holes. Attach the cable 10-15 cm (4-6 in.) from
the connector.
two remaining
mounting holes
30478-M
Install a KwikLink open-style connector to a drop cable
Install the KwikLink open-style connector to the flat media using the
directions starting on page 3-10. Prepare the drop cable following the
directions on page 3-2 numbers 1 through 5. For flat media connections you
can use:
• round 4-wire (KwikLink) drop cable (1485K series)
• round 5-wire (thin) drop cable (1485R series)
Publication DNET-UM072C-EN-P - July 2004
3-14 Make Cable Connections
– You must cut or heat shrink the drain wire when you use round
5-wire (thin) drop cable.
red white blue black
red white blue black
Wire
Color
white CAN_H signal signal
blue CAN_L signal signal
bare drain shield n/a
black V- power power
red V+ power power
Wire
identity
Use Flat
Use only with
KwikLink
The round 4-wire
KwikLink drop cable
(gray) has no drain wire.
To use round 5-wire (thin) drop
cable, bend back and heat shrink,
or cut, the drain wire.
41809
Install end caps
Each KwikLink terminator module is supplied with an end cap designed to
cover the exposed end of the cable. To install the end cap:
1. Fit the end cap (1485A-CAP) on the cable as keyed. Align the end cap
posts with the receptacles in the lower IDC base and press down until
the end cap is firmly seated (the upper surface of the posts will be flush
with the upper surface of the base).
1485A-CAP
Align the end cap posts with
receptacles in the base.
30480-M
2. Close the IDC base and continue with the connection process as
illustrated on page 3-10.
IMPORTANT
When installing an end cap on the other end of the cable,
note that the guide receptacles are on the upper portion of
the IDC base.
Publication DNET-UM072C-EN-P - July 2004
Class 1Auxiliary Power Cable
Spool size Catalog number
75 m (246 ft) 1485C-P1L75
200 m (656 ft) 1485C-P1L200
420 m (1378 ft) 1485C-P1L420
Make Cable Connections 3-15
30481
3. Repeat the end cap installation process as outlined previously. Close the
IDC base and continue with connection as illustrated in the standard
installation instructions starting on page 3-10.
30482
30483
Auxiliary Power Cable
Wire
Color
white user
blue user
Wire
identity
defined
defined
Use
user
defined
user
defined
black V- output
power
red V+ output
power
Install Class 1 KwikLink power cable
Install Class 1 KwikLink power cable as you would network cable. Refer to
page 3-10 for installation instructions. You can use auxiliary power cable
with the ArmorBlock MaXum cable base (1792D-CBFM) and I/O modules
(1792D series). When running cable into an enclosure, use flat cable gland
1485A-CAD.
.
red and black
dc power pair 16 awg
black PVC jacket
5.3 mm (0.21 in.)
white and blue
user defined pair 16 awg
19.3 mm
(0.76 in.)
2.50 mm
(0.10 in.)
30493-M
Publication DNET-UM072C-EN-P - July 2004
3-16 Make Cable Connections
Pinout diagrams for mini and micro connections to the power cable are shown
below.
5-pin Micro Female
mechanical key
not used
V+
23
1
V-
5
user defined
4
user defined
Connect a Power Supply to
Round Media
user defined
user defined
5-pin Mini Female
mechanical key
5
4
3
V-
1
2
not used
V+
user defined
4
V+
4-pin Mini Female
mechanical key
V-
1
23
user defined
30498-M
To supply power you will need to install and ground the power supplies as well
as connect all PowerTap taps. If you haven’t determined power supply
placement, see Chapter 4.
To install a power supply:
ATTENTION
Make sure the ac power source remains off during
installation.
1. Mount the power supply securely allowing for proper ventilation,
connection to the ac power source, and protection from environmental
conditions according to the specifications for the supply.
2. Connect the power supply using:
2
• a cable that has one pair of 12 AWG (3.3mm
equivalent or two pairs of 15 AWG (1.7mm
) conductors or the
2
) conductors
• a maximum cable length of 3m (10 ft) to the PowerTap tap
• the manufacturer’s recommendations for connecting the cable to the
supply
Publication DNET-UM072C-EN-P - July 2004
Make Cable Connections 3-17
Connect Power Supplies to
KwikLink Flat Media
Class 1, 8A System
For a Class 1, 8A System, power may only be interfaced with the network using
a KwikLink open-style connector.
Class 2, 4A System
For a Class 2, 4A System, power may be applied to the network using
KwikLink micro or open-style connectors.
Publication DNET-UM072C-EN-P - July 2004
3-18 Make Cable Connections
Notes:
Publication DNET-UM072C-EN-P - July 2004
Chapter
4
Determine Power Requirements
In this chapter, we describe two methods for determining your system’s power
requirements:
• the look-up method
• the full calculation method
Try the look-up method first, then move on to the full calculation method if
you cannot meet your configuration requirements.
Class 1 (CL1) cable
IMPORTANT
Per NEC specifications for a Class 1 circuit (see NEC Article 725), the energy
at any point in the circuit is limited to 1000 VA. A Class 1 circuit requires that
the cables used must have jacketing with 600V isolation and pass the CL1 burn
test.
The DeviceNet specification indicates that the power source must be a
regulated maximum of 24V dc, and the power circuit be limited to 8A.
Applying this to a Class 1 circuit running at 24V dc, a DeviceNet-certified
cable with a 600V jacket isolation rating meets all requirements to be used in a
Class 1 circuit. So, based on the DeviceNet specification, the cable’s powercarrying conductors are sized for an 8A maximum load.
You must consider two areas when powering output
devices using the DeviceNet power supply:
• (1) Wide DeviceNet voltage range of 11-25V dc
• (2) Noise or transient protection at each device
You must calculate a worst-case situation, and maintain
voltage within the 11-25V dc range on all segments. This
can be accomplished using diodes or other similar
techniques. See Appendix B, Powering Output Devices, for
more information.
1 Publication DNET-UM072C-EN-P - July 2004
4-2 Determine Power Requirements
Class 2 (CL2) Cable
Per NEC specifications for a Class 2 circuit (see NEC Article 725), the energy
in the circuit anywhere is limited to 100 VA and the cable’s jacketing must have
a 300V minimum isolation rating. Based on a 30V dc system, your circuit
would be limited to 3.3A.
The DeviceNet specification indicates the power source be a maximum of 24V
dc. Applying this to a Class 2 circuit running at 24V dc, the maximum
allowable current is 4A. A DeviceNet-certified cable with a 300V jacket
isolation rating meets all requirements for use in a Class 2 circuit. So, based on
the DeviceNet specification, the cable’s power carrying conductors are sized
for a 8A maximum load.
The current Allen-Bradley Thick cable power conductors are sized to handle at
least 8 amps of power. However, NEC and CEC regulations force this cable to
be a CL2 (100 VA, 4 amp max) cable due to the construction of the cable.
Specifically, the insulation on the data pair is a foam PE, which will not pass at
CL1 burn test. As a result, any system using a Thick trunk and Thin drop must
be a CL2 installation in US and Canada.
KwikLink trunk cable is rated for CL1 applications and the conductors can
carry 8 amps of power.For more information, see Appendix A.
The DeviceNet specifications provide for both open- and closed-style wiring
terminations. You can design a wiring system for a DeviceNet installation that
lays out a trunk line in accordance with the requirements of the Class 1
guidelines and uses drop lines in accordance with Class 2 guidelines. Care must
be taken at the point where the two guidelines meet. At that point you must
limit the energy on each wire to be in accordance with the NEC guidelines.
Energy in the drop line must be limited to no more that 100 VA. How you
accomplish that is your decision. Most people resolve this issue by isolating the
trunk from the drop line with different power sources. Other ways to limit
energy may give you the same protection.
Publication DNET-UM072C-EN-P - July 2004
Determine Power Requirements 4-3
Use the Look-up Method
To determine if you have adequate power for the devices in your cable system,
see the following examples and figures. You have enough power if the total
load does not exceed the value shown by the curve or the table.
In a worst-case scenario, all of the nodes are together at the opposite end of
the power supply.
41710
TIP
This method may underestimate the capacity of your
network by as much as 4 to 1. See the following section to
use the full-calculation method if your supply does not fit
under the curve.
For this configuration example Flat cable
One power supply (end-connected) Figure 4.2 Figure 4.1 Figure 4.7
One power supply (middle-connected) Figure 4.2 Figure 4.1 Figure 4.7
NEC/CECode current boost configuration (V+
cut)
Two power supplies (end-connected) Figure 4.6 Figure 4.5 *
Two power supplies (not end-connected) Figure 4.4 Figure 4.3 *
* You can draw as much as 3A from a thin cable trunk line if the power supply separation is
below 70m (230 ft).
uses figure
Figure 4.2 Figure 4.1 Figure 4.7
Thick
cable uses
figure
Thin cable
uses figure
Publication DNET-UM072C-EN-P - July 2004
4-4 Determine Power Requirements
Current (amperes)
Figure 4.1 One Power Supply (End Segment) Round Cable (Thick). Assumes all
nodes are at the opposite end of the cable from the power supply.
NEC/CE Code Maximum
Current Limit
Network
Length
m (ft)
0 (0)
20 (66)
40 (131)
60 (197)
80 (262)
100 (328)
120 (394)
140 (459)
160 (525)
180 (591)
200 (656)
220 (722)
Length of trunk line, meters (feet)
Maximum
Current (A)
8.00*
8.00*
6.53*
4.63*
3.59
2.93
2.47
2.14
1.89
1.69
1.53
1.39
Network
Length
m (ft)
240 (787)
260 (853)
280 (919)
300 (984)
340 (1115)
360 (1181)
380 (1247)
420 (1378)
440 (1444)
460 (1509)
480 (1575)
500 (1640)
41931
Maximum
Current (A)
1.28
1.19
1.10
1.03
0.91
0.86
0.82
0.74
0.71
0.68
0.65
0.63
Publication DNET-UM072C-EN-P - July 2004
∗
Exceeds NEC CL2/CECode 4A limit.
Current (amperes)
Determine Power Requirements 4-5
Figure 4.2 One Power Supply (End Segment) KwikLink Cable (Flat). Assumes all
nodes are at the opposite end of the cable from the power supply.
NEC/CE Code Maximum
Current Limit
Network
Length
m (ft)
0 (0)
20 (66)
40 (131)
60 (197)
80 (262) 3.56
100 (328) 2.86
120 (394) 2.39
140 (459) 2.05
160 (525) 1.79
180 (591) 1.60
200 (656) 1.44
Length of trunk line, meters (feet)
Maximum
Current (A)
*
8.00
*
8.00
*
7.01
*
4.72
Network
Length
Maximum
Current (A)
m (ft)
220 (722) 1.31
240 (787) 1.20
260 (853) 1.11
280 (919) 1.03
300 (984) 0.96
320 (1050) 0.90
340 (1115) 0.85
360 (1181) 0.80
380 (1247) 0.76
400 (1312) 0.72
420 (1378) 0.69
41932
∗
Exceeds NEC CL2/CECode 4A limit.
Publication DNET-UM072C-EN-P - July 2004
4-6 Determine Power Requirements
Current (amperes)
Segment B
Figure 4.3 Two Power Supplies, (One-End Connected, One Middle-Connected);
Two Cable Segments, Round Cable (Thick).
Segment A
NEC/CE Code Maximum
Current Limit
Network
Length
m (ft)
0 (0)
20 (66)
40 (131)
60 (197)
80 (262)
100 (328)
120 (394)
140 (459)
160 (525)
180 (591)
200 (656)
220 (722)
240 (787)
Power Supply A
Maximum
Current (A)
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
Network
Length
m (ft)
260 (853)
280 (919)
300 (984)
320 (1050)
340 (1115)
360 (1181)
380 (1247)
400 (1312)
420 (1378)
440 (1444)
460 (1509)
480 (1575)
500 (1640)
Total Length of trunk line, meters (feet)
Maximum
Current (A)
8.00*
7.69*
7.21*
6.78*
6.41*
6.07*
5.76*
5.49*
5.24*
5.01*
4.80*
4.73*
4.66*
Network
Length
m (ft)
0 (0)
20 (66)
40 (131)
60 (197)
80 (262)
100 (328)
120 (394)
140 (459)
160 (525)
180 (591)
200 (656)
220 (722)
240 (787)
Power Supply B
Maximum
Current (A)
8.00*
8.00*
8.00*
7.38*
5.71*
4.66*
3.94
3.40
3.00
2.68
2.43
2.22
2.08
Network
Length
m (ft)
260 (853)
280 (919)
300 (984)
320 (1050)
340 (984)
360 (1050)
380 (1247)
400 (1312)
420 (1378)
440 (1444)
460 (1509)
480 (1575)
500 (1640)
41933
Maximum
Current (A)
1.89
1.76
1.64
1.54
1.46
1.38
1.31
1.24
1.18
1.13
1.08
1.07
1.05
∗
Exceeds NEC CL2/CECode 4A limit.
Publication DNET-UM072C-EN-P - July 2004
∗
Exceeds NEC CL2/CECode 4A limit.
Determine Power Requirements 4-7
Figure 4.4 Two Power Supplies, (One End-Connected, One Middle-Connected);
Two Cable Segments, KwikLink Cable (Flat).
Segment A
Current (amperes)
Network
Length
m (ft)
0 (0)
20 (66)
40 (131)
60 (197)
80 (262)
100 (328)
120 (394)
140 (459)
160 (525)
180 (591)
200 (656)
Segment B
Segment Supply A
Maximum
Current (A)
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
Network
Length
m (ft)
220 (722)
240 (787)
260 (853)
280 (919)
300 (984)
320 (1050)
340 (1115)
360 (1181)
380 (1247)
400 (1312)
420 (1378)
Total Length of trunk line, meters (feet)
Maximum
Current (A)
Network
Length
m (ft)
8.00*
8.00*
7.91*
7.35*
6.86*
6.43*
6.06*
5.72*
5.43*
5.16*
4.91*
0 (0)
20 (66)
40 (131)
60 (197)
80 (262)
100 (328)
120 (394)
140 (459)
160 (525)
180 (591)
200 (656)
NEC/CE Code Maximum
Current Limit
Segment Supply B
Maximum
Current (A)
8.00*
8.00*
8.00*
7.52*
5.67*
4.55*
3.80
3.26
2.86
2.54
2.29
Network
Length
m (ft)
220 (722)
240 (787)
260 (853)
280 (919)
300 (984)
320 (1050)
340 (984)
360 (1050)
380 (1247)
400 (1312)
420 (1378)
41934
Maximum
Current (A)
2.08
1.91
1.76
1.64
1.53
1.43
1.35
1.28
1.21
1.19
1.09
∗
Exceeds NEC CL2/CECode 4A limit.
∗
Exceeds NEC CL2/CECode 4A limit.
Publication DNET-UM072C-EN-P - July 2004
4-8 Determine Power Requirements
Figure 4.5 Two End-Connected Power Supplies, Round Cable (Thick).
Current (amperes)
NEC/CE Code Maximum
Current Limit
Length of trunk line, meters (feet)
41935
Network
Length
m (ft)
0 (0)
20 (66)
40 (131)
60 (197)
80 (262)
100 (328)
120 (394)
140 (459)
160 (525)
180 (591)
200 (656)
220 (722)
240 (787)
Maximum
Current (A)
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
7.68*
6.77*
6.05*
5.47*
4.99*
4.59*
Network
Length
m (ft)
260 (853)
280 (919)
300 (984)
320 (1050)
340 (1115)
360 (1181)
380 (1247)
400 (1312)
420 (1378)
440 (1444)
460 (1509)
480 (1575)
500 (1640)
Maximum
Current (A)
4.25*
3.96
3.70
3.48
3.28
3.10
2.94
2.79
2.66
2.55
2.44
2.34
2.25
Publication DNET-UM072C-EN-P - July 2004
∗
Exceeds NEC CL2/CECode 4A limit.
Current (amperes)
Determine Power Requirements 4-9
Figure 4.6 Two End-Connected Power Supplies, KwikLink Cable (Flat)
NEC/CE Code Maximum
Current Limit
Network
length
m (ft)
0 (0)
20 (66)
40 (131)
60 (197)
80 (262)
100 (328)
120 (394)
140 (459)
160 (525)
180 (591)
200 (656)
Length of trunk line, meters (feet)
Maximum
current (A)
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
8.00*
7.35*
6.43*
5.72*
5.16*
Network
length
m (ft)
220 (722)
240 (787)
260 (853)
280 (919)
300 (984)
320 (1050)
340 (1115)
360 (1181)
380 (1247)
400 (1312)
420 (1378)
41936
Maximum
current (A)
4.69*
4.30*
3.97
3.69
3.44
3.23
3.04
2.87
2.72
2.59
2.46
∗
Exceeds NEC CL2/CECode 4A limit.
Publication DNET-UM072C-EN-P - July 2004
4-10 Determine Power Requirements
Current (amperes)
Figure 4.7 One Power Supply (End Segment) Round Cable (Thin)
NEC/CE Code Maximum
Current Limit
Length of trunk line, meters (feet)
Network
length
Maximum
current (A)
m (ft)
0 (0)
10 (33)
20 (66)
30 (98)
40 (131)
50 (164)
60 (197)
70 (230)
80 (262)
90 (295)
100 (328)
3.00
3.00
3.00
2.06
1.57
1.26
1.06
0.91
0.80
0.71
0.64
41937
Publication DNET-UM072C-EN-P - July 2004
Determine Power Requirements 4-11
One power supply (end-connected)
The following example uses the look-up method to determine the
configuration for one end-connected power supply. One end-connected power
supply provides as much as 8A near the power supply.
power
supply
106m
T
0.15A
(350 ft)
0.30A
0.10A
41833
53m
30m
23m
TR TR
TR = terminating resistorT = T-Port tap
PT = PowerTap tapD = device
(75 ft)
PT
(100 ft)
TTT
D1 D2 D3 D4
0.10A
(175 ft)
1. Determine the total length of the network.
106m
2. Add each device’s current together to find the total current.
0.10 + 0.15 + 0.30 + 0.10
IMPORTANT
Make sure that the required power is less than the rating of
the power supply. You may need to derate the supply if it is
in an enclosure.
3. Find the value next largest to the network length using Figure 4.1 on
Page 4-4 to determine the approximate maximum current allowed for
the system.
120m (2.47A)= 0.65A
Publication DNET-UM072C-EN-P - July 2004
4-12 Determine Power Requirements
Results
system will operate properly (0.65A ≤ 2.47A).
IMPORTANT
One power supply (middle-connected)
The following example uses the look-up method to determine the
configuration for one middle-connected power supply. One middle-connected
power supply provides the maximum current capability for a single supply.
section 1 section 2
122m
(400 ft)
TR
TT T TT
Since the total current does not exceed the maximum allowable current, the
D1
1.10A
TR = terminating resistor T = T-Port tap
PT = PowerTap tap D = device
D2 D3
1.25A
If your application doesn’t fit “under the curve”, you may
either:
• do the full-calculation method described later in this
chapter, or
• move the power supply to somewhere in the middle of
the cable system and reevaluate per the following
section
power
supply
122m
D4
(400 ft)
D5 D6
0.25A
91m
(300 ft)
0.50A
37m
(120 ft)
91m
(300 ft)
49m
(160 ft)
PT
0.25A
T
0.25A
41857
TR
Publication DNET-UM072C-EN-P - July 2004
1. Add each device’s current together in section 1.
1.10 + 1.25 + 0.50 = 2.85A
2. Add each device’s current together in section 2.
0.25 + 0.25 + 0.25 = 0.75A
3. Find the value next largest to each section’s length to determine the
approximate maximum current allowed for each section.
Section 1 = 140m (2.14A)
Section 2 = 140m (2.14A)
Determine Power Requirements 4-13
Results
IMPORTANT
Section 1 + Section 2 < 3.6A. This is < 4A for
NEC/CECode compliance.
Section 1 is overloaded because the total current exceeds the maximum
current (2.85A >
2.14A).
Section 2 is operational since the total current does not exceed the maximum
current (0.75A <
2.14A).
Balance the system by moving the power supply toward the overloaded section
(section 1). Then recalculate each section.
Publication DNET-UM072C-EN-P - July 2004
4-14 Determine Power Requirements
4. Add each device’s current together in section 1.
1.10+1.25+0.50 = 2.85A
5. Add each device’s current together in section 2.
0.25+0.25+0.25 = 0.75A
6. Find the value next largest to each section’s length using Figure 4.1 on
Page 4-4 to determine the approximate maximum current allowed for
each section.
power
supply
section 1
section 2
86 m
(282 ft)
55 m
(180 ft)
1 m
(3 ft)
TTR TRT T T T T
D1
1.10A 1.25A 0.50A 0.25A 0.25A 0.25A
TR = terminating resistor T = T-Port tap
PT = Power Tap D = device
D2 D3 D4 D5 D6
PT
127 m
(417 ft)
85 m
(279 ft)
158 m
(518 ft)
Section 1 = 100m (2.93A)
Section 2 = 160m (1.89A)
IMPORTANT
Section 1+ Section 2 < 3.6A. This is < 4A for
NEC/CECode compliance. However, if due to derating of
the power supply, you used a power supply larger than 4A,
you would exceed the NEC/CECode maximum allowable
current.
31513-M
Results
Publication DNET-UM072C-EN-P - July 2004
Section 1 is operational since the total current does not exceed the maximum
current (2.85A <
2.93A).
Section 2 is operational since the total current does not exceed the maximum
current (0.75A <
1.89A).
Determine Power Requirements 4-15
Adjusting the configuration
To make the system operational, you can:
• move the power supply in the direction of the overloaded section
• move higher current loads as close to the supply as possible
• move devices from the overloaded section to another section
• shorten the overall length of the cable system
• perform the full-calculation method for the segment described later in
this chapter for the non-operational section
• add a second power supply to the cable system (do this as a last resort)
as shown in the following three examples
NEC/CECode current boost configuration
If the national or local codes limit the maximum rating of a power supply, use
the following configuration to replace a single, higher current power supply.
power
supply
244 m
(800 ft)
122 m
(400 ft)
30 m
(100 ft)
15 m
(50 ft)
PT
TR
1.0A 0.50A 0.50A
TR = terminating resistor T = T-Port tap
PT = Power Tap D = device
D1 D2 D3
TRT T T T
D4
0.25A
31514-M
This configuration effectively doubles the available current. Essentially, each
segment is independent of the other and is a “one power supply
end-connected system”. Use Figure 4.5 on page 4-8 for each segment. Each
power supply can be rated up to 4A and still meet NEC/CECode Class 2
current restrictions.
Publication DNET-UM072C-EN-P - July 2004
4-16 Determine Power Requirements
.
Wire
Color
Wire
identity
Use
white CAN_H signal
blue CAN_L signal
bare drain shield
black V- power
red V+ power
trunk line
IMPORTANT
CAN_H
CAN_L
drain
VV+
To use this configuration, you must make the following
PowerTap tap modifications:
• place no loads between the PowerTap taps
• remove fuses between the two PowerTap taps to
segment the V+ conductor in the trunk line between
the taps
• cut V+ (red) flush with cable jacket
remove
V+ V-
power
supply
these
fuses
ground
V- V+
power
supply
41828
Publication DNET-UM072C-EN-P - July 2004
Two power supplies (end-connected) in parallel with no V+ break
The following example uses the look-up method to determine the
configuration for two end-connected power supplies. You must use diodes at
the power taps to prevent back-feeding of the power supplies. Check your
national and local codes for any restrictions on the use of parallel power
supplies. The NEC/CECode requires that the power supplies must be listed
for parallel operation.
Determine Power Requirements 4-17
power
supply
122m
(400 ft)
76m
(250 ft)
30m
(100 ft)
TR
PT
TR = terminating resistorT = T-Port tap
PT = PowerTap D = device
T
D1 D2 D3 D4 D5 D6
0.25A 0.50A 0.10A 0.25A 1.00A 0.10A
T
T
274m
(900 ft)
TT
122m
(400 ft)
76m
(250 ft)
30m
(100 ft)
T
1. Determine the total length of the network.
274m
2. Add each device’s current together to find the total current.
0.25+0.50+0.10+0.25+1.00+0.10 = 2.20A
3. Find the value next largest to each section’s length using Figure 4.5 on
page 4-8 to determine the approximate maximum current allowed for
each section.
power
supply
PT
TR
41861
Results
280m (3.96A)
Since the total current does not exceed the maximum current, the system will
operate properly (2.20A ≤ 3.96A).
Publication DNET-UM072C-EN-P - July 2004
4-18 Determine Power Requirements
Two Power supplies (not end-connected) in parallel with no V+
break
The following example uses the look-up method to determine the
configuration for two power supplies that are not end-connected. This
configuration provides the most power to the cable system. You must use
diodes at the power taps to prevent back-feeding of the power supplies. Check
your national and local codes for any restrictions on the use of parallel power
supplies.
power
supply
section 1
section 2
244 m
(800 ft)
122 m
(400 ft)
30 m
(100 ft)
TTR TRT T T T T
D3
0.25A 0.25A 0.25A 0.25A 1.5A 0.5A
TR = terminating resistor T = T-Port tap
PT = Power Tap D = device
D2 D1 D4 D5 D6
PT
122 m
(400 ft)
60 m
(200 ft)
244 m
(800 ft)
1. Determine the trunk line length of one end section (for this example we
will use section 3).
122m
2. Add each device’s current together in section 3.
31515-M
Publication DNET-UM072C-EN-P - July 2004
0.25+1.00+0.30 = 1.55A
Determine Power Requirements 4-19
3. Find the value next largest to the length of section 3 using Figure 4.3 on
page 4-6 to determine the approximate maximum current allowed
(approximately).
140m (3.40A)
Results
IMPORTANT
If the total current in the section exceeds the maximum
current, move the power supply closer to the end and
repeat steps 1-3 until the total current in the section is less
than the maximum allowable current.
Since the total current does not exceed the maximum current, section 3 will
operate properly (1.55A ≤ 3.40A).
Loading is 46% (1.55/3.40).
4. Determine the trunk line length of the other end section (section 1).
76m
5. Add each device’s current together in section 1.
2.25A
6. Find the value next largest to the length of section 1 using Figure 4.1 on
page 4-4 to determine the approximate maximum current allowed.
80m (3.59A)
Results
IMPORTANT
If the total current in the section exceeds the maximum
current, move the power supply closer to the end and
repeat steps 4-6 until the total current in the section is less
than the maximum allowable current.
Since the total current does not exceed the maximum current, section 1 will
operate properly (2.25A ≤ 3.59A). Loading is 63% (2.25/3.59).
7. Determine the length of the middle section (section 2).
274m
8. Add each device’s current together in section 2.
1.50+2.00 = 3.50A
Publication DNET-UM072C-EN-P - July 2004
4-20 Determine Power Requirements
9. Find the value next largest to the length of section 2 using Figure 4.3 on
page 4-6 to determine the approximate maximum current allowed.
280m (7.69A)
Results
IMPORTANT
If the total current in the section exceeds the maximum
current, move the power supplies closer together and
repeat steps 7-9 until the total current in the section is less
than the maximum allowable current.
Since the total current does not exceed the maximum allowable current,
section 2 will operate properly (3.50A ≤ 7.69A).
Loading is 46% (3.50/7.69).
If the middle section is still overloaded after you move the power supplies
closer together, add a third power supply. Then recalculate each segment.
IMPORTANT
Section 1 + Section 2 + Section 3 = 7.3A. This is > 4A and
does not comply with the NEC/CECode for Class 2
installations.
IMPORTANT
To determine spare capacity for future expansion,
subtract the actual current from the maximum allowable
current. To determine the percentage loading for each
segment, divide the maximum allowable current into the
actual curr ent.
Use the Full-calculation
Method
Publication DNET-UM072C-EN-P - July 2004
Segment Maximum Current -
Actual Current =
1 2.85A - 2.25A= 0.60A 79% (2.25A/2.85A)
2 3.83A - 3.50A= 0.33A 91% (3.50A/3.83A)
3 1.70A - 1.55A= 0.15A 91% (1.55A/1.70A)
Spare Capacity % Loading/Segment
Use the full-calculation method if your initial evaluation indicates that one
section is overloaded or if the requirements of your configuration cannot be
met by using the look-up method.
IMPORTANT
Before constructing the cable system, repeat all calculations
to avoid errors.
Determine Power Requirements 4-21
Use the Equation
Ter m Definition
L
n
R
c
N
t
A supply that is not end-connected creates two sections of trunk line. Evaluate
each section independently.
SUM {[(L
L = The distance (m or ft) between the device and the power supply, excluding the drop line distance.
n = The number of a device being evaluated, starting with one for the device closest to the power supply and increasing
by one for the next device. The equation sums the calculated drop for each device and compares it to 4.65V.
Thick cable
Metric 0.015 Ω/m
English 0.0045 Ω/ft
Thin cable
Metric 0.069 Ω/m
English 0.021 Ω/ft
Flat Cable
Metric 0.019 Ω/m
English 0.0058 Ω/ft
The number of taps between the device being evaluated and the power supply. For example:
when a device is the first one closest to the power supply, this number is 1
x (Rc)) + (Nt x (0.005))] x In} < 4.65V
n
when a device has one device between it and the power supply, this number is 2
when 10 devices exist between the evaluated device and the power supply, this number is 11.
For devices attached to a DeviceBox tap or DevicePort tap, treat the tap as one tap. The currents for all devices attached
to one of these taps should be summed and used with the equation only once.
(0.005)
I
n
4.65V The maximum voltage drop allowed on the DeviceNet trunk line. This is the total cable system voltage drop of 5.00V
The nominal-contact resistance used for every connection to the trunk line.
I = The current drawn from the cable system by the device.For currents within 90% of the maximum, use the nominal
device current. Otherwise, use the maximum rated current of the device. For DeviceBox taps or DevicePort taps, sum the
currents of all the attached devices, and count the tap as one tap.
n = The number of a device being evaluated, starting with one for the device closest to the power supply and increasing
by one for the next device.
minus 0.35V reserved for drop line voltage drop.
Publication DNET-UM072C-EN-P - July 2004
4-22 Determine Power Requirements
One power supply (end-connected)
Example using thick cable
The following example uses the full calculation method to determine the
configuration for one end-connected power supply on a thick cable trunk line.
• Device 1 and Device 2 cause the same voltage drop but Device 2 is
twice as far from the power supply and draws half as much current.
• Device 4 draws the least amount of current but it is furthest from the
power supply and causes the greatest incremental voltage drop.
power
supply
244 m
(800 ft)
122 m
30 m
(100 ft)
15 m
(50 ft)
PT
TR
(400 ft)
TRT T T T
1.0A
0.50A
0.50A
0.25A
Results
D1
D2
D3
D4
TR = terminating resistor T = T-Port tap
PT = Power Tap D = device
D1 D2 D3
1.0A 0.50A 0.50A
D4
0.25A
31514-M
1. Find the voltages for each device using the equation for thick cable.
SUM {[(L
x (0.0045)) + (Nt x (0.005))] x In} < 4.65V.
n
A.[(50 x (0.0045)) + (1 x (0.005))] x 1.00 = 0.23V
B.[(100 x (0.0045)) + (2 x (0.005))] x 0.50 = 0.23V
C.[(400 x (0.0045)) + (3 x (0.005))] x 0.50 = 0.91V
D.[(800 x (0.0045)) + (4 x (0.005))] x 0.25 = 0.91V
2. Add each device’s voltage together to find the total voltage.
0.23V + 0.23V + 0.91V + 0.91V = 2.28V
Since the total voltage does not exceed 4.65V, the system will operate properly
(2.28V <
4.65V).
Publication DNET-UM072C-EN-P - July 2004
The percent loading is found by dividing the total voltage by 4.65V.
%Loading = 2.28/4.65 = 49%
Loading...